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F
Symbol for:
- Fractional concentration, followed by subscripts indicating location and chemical species
- Fahrenheit
- Farad
- Faraday, Faraday constant, force
- Father
- Female
- Fertility
- Filial generation, followed by subscript numerals indicating specified matings
- Fluorine
- Foot
- Formula
- Free energy
- Folate
- Phenylalanine
- Variance ratio.
- Focus
- French scale
- Visual field.
f
Symbol for:
- farad
- father
- female
- Femto-
- Fugacity
- foot
- formula
- Formyl
- Fumarose form (usually following the symbol for the monosaccharide)
- Respiratory frequency.
F–actin (ˈef-ˌak-tən)
Fibrous actin polymerized in the form of a double helix that is produced in the presence of a metal cation (as of calcium) and ATP.
F1 generation
The first generation produced by a cross and consisting of individuals heterozygous for characters in which the parents differ and are homozygous - aka first filial generation.
F1 hybrid
An individual of an F1 generation - aka first generation hybrid.
F.A.A.N.
Abbreviation for Fellow of the American Academy of Nursing.
FAB
Abbreviation for French-American-British (classification of acute leukemias). See F. classification.
Fab
See F. fragment.
fabella (fa-bel′la)
A sesamoid bone in the tendon of the lateral head of the gastrocnemius muscle. [Mod. L. dim. of faba, bean]
Faber
Knud H., Danish physician, 1862–1956. See F. anemia, F. syndrome.
fabism (fa′bizm)
SYN: favism. [L. faba, bean]
fabrication (fab-ri-ka′shun)
Telling false tales as true; e.g., the malingering of symptoms or illness or feigning an incorrect response or calculation during a psychological or mental status examination.
Fabricius, Fabrizzi
Girolamo (Hieronymus ab Aquapendente), Italian anatomist and embryologist, 1537–1619. See bursa fabricii, F. ship.
Fabry
Johannes, German dermatologist, 1860–1930. See F. disease.
F.A.C.C.P.
Abbreviation for Fellow of the American College of Chest Physicians.
F.A.C.D.
Abbreviation for Fellow of the American College of Dentists.
face (ˈfās)
- The front portion of the head
- The visage including eyes, nose, mouth, forehead, cheeks, and chin; excludes ears. SYN: facies, surface.
- surface, especially a front, upper, or outer surface.
- bird f. SYN: brachygnathia.
- cow f. SYN: facies bovina.
- dish f. SYN: facies scaphoidea.
- frog f. the appearance caused by broadening of the nose, which occurs in certain cases of nasal polyps.
- hippocratic f. SYN: hippocratic facies.
- masklike f. SYN: Parkinson facies.
- moon f. the round, usually red f., with large jowls, seen in Cushing disease or in exogenous hyperadrenocorticalism.
- moon shaped f. moon facies.
- superolateral f. of cerebral hemisphere [TA] SYN: superolateral surface of cerebrum.
face-bow
A caliper-like device used to record the relationship of the jaws to the temporomandibular joints; the record may then be used to orient a cast or model of the maxilla to the opening and closing axis of the articulator. SYN: hinge-bow.
adjustable axis face-bow a f. whose caliper ends can be adjusted to permit location of the axis of rotation of the mandible. SYN: kinematic face-bow.
kinematic face-bow SYN: adjustable axis face-bow.
face-lift
SYN: rhytidectomy.
facet, facette (ˈfas-ət, fa-set′)
- A smooth flat or nearly flat circumscribed anatomical surface.
- A worn spot on a tooth, produced by chewing or grinding. [Fr. facette]
- acromial f. of clavicle: a small oval f. on the lateral end of the clavicle for articulation with the acromion. SYN: facies articularis acromialis claviculae, acromial articular facies of clavicle, acromial articular surface of clavicle.
- articular f. a relatively small articular surface of a bone, especially a vertebra.
- articular f. of head of fibula the flat circular surface on the head of the fibula for articulation with the corresponding f. on the lateral condyle of the tibia. SYN: facies articularis capitis fibulae.
- articular f. of head of rib an articular surface on the head of a rib that articulates with the body of a vertebra. SYN: facies articularis capitis costae.
- articular f. of lateral malleolus the surface on the medial aspect of the lateral malleolus that articulates with the talus. SYN: facies articularis malleoli lateralis fibulae, malleolar articular surface of fibula.
- articular f. of medial malleolus the articular f. on the lateral surface of the medial malleolus for articulation with the side of the talus; it is continuous with the inferior articular surface of the tibia. SYN: facies articularis malleoli medialis tibiae, malleolar articular surface of tibia.
- articular f. of radial head the depression on the top (superior surface) of the head of the radius for articulation with the capitulum of the humerus. SYN: fovea articularis capitis radii, articular pit of head of radius, fovea of radial head.
- articular f. of tubercle of rib an oval f. on the inferomedial part of the tubercle of a rib for articulation with a f. on the transverse process of a vertebra. SYN: facies articularis tuberculi costae.
- f. (of atlas) for dens a circular f. on the posterior (inner) surface of the anterior arch of the atlas which articulates with the dens of the axis. SYN: fovea dentis atlantis, pit of atlas for dens.
- clavicular f. SYN: clavicular notch of sternum.
- clavicular articular f. of acromion a small oval f. on the medial border of the acromion for articulation with the lateral end of the clavicle. SYN: facies articularis clavicularis acromii, articular surface of acromion.
- corneal f. a corneal depression following loss of stroma.
- costal facets articular surface on a vertebra for articulation with a rib.
- fibular articular f. of tibia the flat circular articular f. on the inferior and lateral aspect of the lateral condyle of the tibia for articulation with the head of the fibula. SYN: facies articularis fibularis tibiae, fibular articular surface of tibia.
- inferior articular f. of atlas SYN: inferior articular surface of atlas.
- inferior costal f. demifacet on the lower edge of the body of a vertebra articulating with the head of a rib. SYN: fovea costalis inferior, inferior costal pit.
- lateral malleolar f. of talus that surface of the trochlea of the talus that articulates with the lateral malleolus of the fibula. SYN: facies malleolaris lateralis tali, lateral malleolar surface of talus.
- Lenoir f. the medial articular surface of the patella.
- locked facets SYN: dislocation of articular processes.
- medial malleolar f. of talus the surface of the trochlea of the talus that articulates with the medial malleolus of the tibia. SYN: facies malleolaris medialis tali.
- f. (on talus) for calcaneonavicular part of bifurcate ligament small f. at the lateral edge of the navicular articular surface that lies in contact with the medial surface of the medial part of the bifurcate ligament. SYN: facies articularis partis calcaneonavicularis ligamenti bifurcati tali.
- f. (on talus) for plantar calcaneonavicular ligament inferiormost portion of the articular surface of the head of the talus that contacts (rests on) the plantar calcaneonavicular ligament. SYN: facies ligamenti calcaneonavicularis plantaris tali.
- posterior articular f. of dens the f. on the posterior surface of the dens of the axis that articulates with the transverse ligament of the atlas. SYN: facies articularis posterior dentis, posterior articular surface of dens.
- sternal f. of clavicle the oval surface on the sternal end of the clavicle that articulates with the fibrocartilaginous disk of the sternoclavicular joint. SYN: facies articularis sternalis claviculae, sternal articular surface of clavicle.
- superior articular f. of atlas SYN: superior articular surface of atlas.
- superior costal f. a demifacet on the upper edge of the body of a vertebra articulating with the head of a rib; a single rib articulates with the inferior costal f. and superior costal f. of the adjacent vertebrae. SYN: fovea costalis superior, superior costal pit.
- superior f. of trochlear of talus the surface of the trochlea of the talus in contact with the inferior articular surface of the tibia. SYN: facies superior tali, superior surface of talus.
- transverse costal f. a f. on the transverse process of a vertebra for articulation with the tubercle of a rib. SYN: fovea costalis processus transversi, costal pit of transverse process.
facetectomy (fas-e-tek′to-me)
Excision of a facet. [facet + G. ektome, excision]
facial (fa′shal)
Relating to the face. SYN: facialis.
facialis (fa-she-a′lis)
SYN: facial, facial. [L.]
-facient
Causing; one who or that which brings about. [L. facio, to make]
facies, pl .facies (ˈfā-sh(ē-ˌ)ēz)
- SYN: face (1).
- SYN: surface.
- SYN: expression.
- acromial articular f. of clavicle SYN: acromial facet of clavicle.
- adenoid f. the open-mouthed and often dull appearance in children with adenoid hypertrophy, associated with a pinched nose.
- f. antebrachialis anterior SYN: anterior region of forearm.
- f. antebrachialis posterior SYN: posterior region of forearm.
- f. anterior SYN: anterior surface.
- f. anterior antebrachii SYN: anterior region of forearm.
- f. anterior brachii SYN: anterior region of arm.
- f. anterior corneae SYN: anterior surface of cornea.
- f. anterior corporis maxillae SYN: anterior surface of maxilla.
- f. anterior cruris SYN: anterior region of leg.
- f. anterior glandulae suprarenalis SYN: anterior surface of suprarenal gland.
- f. anterior iridis SYN: anterior surface of iris.
- f. anterior lateralis corporis humeri SYN: anterolateral surface of (shaft of) humerus.
- f. anterior lentis SYN: anterior surface of lens.
- f. anterior medialis corporis humeri SYN: anteromedial surface of shaft of humerus.
- f. anterior membri inferioris SYN: anterior surface of lower limb.
- f. anterior palpebrarum SYN: anterior surface of eyelids.
- f. anterior partis petrosae ossis temporalis SYN: anterior surface of petrous part of temporal bone.
- f. anterior patellae SYN: anterior surface of patella.
- f. anterior prostatae SYN: anterior surface of prostate.
- f. anterior radii SYN: anterior surface of radius.
- f. anterior renis SYN: anterior surface of kidney.
- f. anterior ulnae SYN: anterior surface of ulna.
- f. anterior uteri SYN: anterior surface of uterus.
- f. anteroinferior corporis pancreatis SYN: anteroinferior surface of pancreas.
- f. anterolateralis cartilaginis arytenoideae SYN: anterolateral surface of arytenoid cartilage.
- f. anterolateralis corporis humeri SYN: anterolateral surface of (shaft of) humerus.
- f. anteromedialis corporis humeri SYN: anteromedial surface of shaft of humerus.
- f. anterosuperioris corporis pancreatis SYN: anterosuperior surface of body of pancreas.
- f. antonina a facial expression due to alteration in the eyelids and anterior segment of the eye; found in leprosy.
- aortic f. the pale sallow complexion of one suffering from incompetence of the aortic valve; nonspecific.
- f. approximalis dentis SYN: approximal surface of tooth.
- f. articularis SYN: articular surface.
- f. articularis acromialis claviculae SYN: acromial facet of clavicle.
- f. articularis anterior dentis SYN: anterior articular surface of dens.
- f. articularis arytenoidea cricoideae SYN: arytenoidal articular surface of cricoid.
- f. articularis calcanea tali SYN: calcaneal articular surface of talus.
- f. articularis capitis costae SYN: articular facet of head of rib.
- f. articularis capitis fibulae SYN: articular facet of head of fibula.
- f. articularis carpi radii SYN: carpal articular surface of radius.
- f. articularis cartilaginis arytenoideae SYN: articular surface of arytenoid cartilage.
- f. articularis clavicularis acromii SYN: clavicular articular facet of acromion.
- f. articularis cuboidea ossis calcanei SYN: articular surface on calcaneus for cuboid bone.
- f. articularis fibularis tibiae SYN: fibular articular facet of tibia.
- f. articularis fossae mandibularis ossis temporalis SYN: articular surface of mandibular fossa of temporal bone.
- f. articularis inferior atlantis SYN: inferior articular surface of atlas.
- f. articularis inferior tibiae SYN: inferior articular surface of tibia.
- f. articularis malleoli lateralis fibulae SYN: articular facet of lateral malleolus.
- f. articularis malleoli medialis tibiae SYN: articular facet of medial malleolus.
- f. articularis navicularis tali SYN: navicular articular surface of talus.
- f. articularis partis calcaneonavicularis ligamenti bifurcati tali SYN: facet (on talus) for calcaneonavicular part of bifurcate ligament.
- f. articularis patellae SYN: articular surface of patella.
- f. articularis posterior dentis SYN: posterior articular facet of dens.
- f. articularis sternalis claviculae SYN: sternal facet of clavicle.
- f. articularis superior atlantis SYN: superior articular surface of atlas.
- f. articularis superior tibiae SYN: superior articular surface of tibia.
- f. articularis talaris anterior calcanei SYN: anterior talar articular surface of calcaneus.
- f. articularis talaris calcanei SYN: talar articular surfaces of calcaneus, under surface.
- f. articularis talaris media calcanei SYN: middle talar articular surface of calcaneus.
- f. articularis talaris posterior calcanei SYN: posterior talar articular surface (of calcaneus).
- f. articularis thyroidea cricoideae SYN: thyroid articular surface of cricoid (cartilage).
- f. articularis tuberculi costae SYN: articular facet of tubercle of rib.
- f. auricularis ossis ilii SYN: auricular surface of ilium.
- f. auricularis ossis sacri SYN: auricular surface of sacrum.
- f. bovina the cowlike face of ocular hypertelorism; typical of craniofacial dysostosis. SYN: cow face.
- f. brachialis anterior SYN: anterior region of arm.
- f. brachialis posterior SYN: posterior region of arm.
- f. cerebralis SYN: cerebral surface.
- cherubic f. the characteristic child-like f. seen in cherubism; also seen in glycogenosis, particularly type 2.
- f. colica splenis SYN: colic impression of spleen.
- f. contactus dentis SYN: approximal surface of tooth.
- Corvisart f. the characteristic f. seen in cardiac insufficiency or aortic regurgitation; a swollen, purplish, cyanotic face with shiny eyes and puffy eyelids; nonspecific.
- f. costalis SYN: costal surface.
- f. costalis pulmonis SYN: costal surface of lung.
- f. costalis scapulae SYN: costal surface of scapula.
- f. cruralis anterior SYN: anterior region of leg.
- f. cruralis posterior SYN: posterior region of leg.
- f. cubitalis anterior SYN: anterior region of elbow.
- f. cubitalis posterior SYN: posterior region of elbow.
- f. diaphragmatica SYN: diaphragmatic surface.
- f. digitalis dorsalis (manus et pedis) SYN: dorsal surface of digit (of hand or foot).
- f. digitalis palmaris SYN: palmar surfaces of fingers, under surface.
- f. digitalis plantaris SYN: plantar surface of toe.
- f. digitalis ventralis SYN: palmar surfaces of fingers, under surface.
- f. distalis dentis SYN: distal surface of tooth.
- f. dolorosa facial expression of an unhappy person or one sick or in pain.
- f. dorsalis SYN: dorsal surface.
- f. dorsalis ossis sacri SYN: dorsal surface of sacrum.
- f. dorsalis scapulae SYN: posterior surface of scapula.
- elfin f. f. characterized by a short, upturned nose, wide mouth, widely spaced eyes, and full cheeks; it may be associated with hypercalcemia, supravalvar aortic stenosis, and mental retardation.
- f. externa SYN: external surface.
- f. externa ossis frontalis SYN: external surface of frontal bone.
- f. externa ossis parietalis SYN: external surface of parietal bone.
- f. facialis dentis SYN: vestibular surface of tooth.
- f. femoralis anterior SYN: anterior region of thigh.
- f. femoralis posterior SYN: posterior region of thigh.
- f. gastrica splenis SYN: gastric impression on spleen.
- f. glutea ossis ilii SYN: gluteal surface of ilium.
- hippocratic f., f. hippocratica a pinched expression of the face, with sunken eyes, concavity of cheeks and temples, relaxed lips, and leaden complexion; observed in one close to death after severe and prolonged illness. SYN: hippocratic face.
- hound-dog f. the facial appearance in cutis laxa, with loose facial skin hanging in folds.
- Hutchinson f. the peculiar facial expression produced by the drooping eyelids and motionless eyes in external ophthalmoplegia.
- f. inferior hemispherii cerebri SYN: inferior surface of cerebellar hemisphere.
- f. inferior linguae SYN: inferior surface of tongue.
- f. inferior partis petrosae ossis temporalis SYN: inferior surface of petrous part of temporal bone.
- f. inferolateralis prostatae SYN: inferolateral surface of prostate.
- f. infratemporalis alaris majoris ossis sphenoidalis SYN: infratemporal surface of greater wing of sphenoid.
- f. infratemporalis corporis maxillae SYN: infratemporal surface of (body of) maxilla.
- f. interlobares pulmonis SYN: interlobar surfaces of lung, under surface.
- f. interna SYN: internal surface.
- f. interna ossis frontalis SYN: internal surface of frontal bone.
- f. interna ossis parietalis SYN: internal surface of parietal bone.
- f. intestinalis uteri SYN: intestinal surface of uterus.
- f. lateralis SYN: lateral surface.
- f. lateralis brachii SYN: lateral surface of arm.
- f. lateralis cruris SYN: lateral surface of leg.
- f. lateralis digiti manus SYN: lateral surface of finger.
- f. lateralis digiti pedis SYN: lateral surface of toe.
- f. lateralis fibulae SYN: lateral surface of fibula.
- f. lateralis membri inferioris SYN: lateral surface of lower limb.
- f. lateralis ossis zygomatici SYN: lateral surface of zygomatic bone.
- f. lateralis ovarii SYN: lateral surface of ovary.
- f. lateralis testis SYN: lateral surface of testis.
- f. lateralis tibiae SYN: lateral surface of tibia.
- leonine f. SYN: leontiasis.
- f. ligamenti calcaneonavicularis plantaris tali SYN: facet (on talus) for plantar calcaneonavicular ligament.
- f. lingualis dentis SYN: lingual surface of tooth.
- f. lunata acetabuli SYN: lunate surface of acetabulum.
- f. malleolaris lateralis tali SYN: lateral malleolar facet of talus.
- f. malleolaris medialis tali SYN: medial malleolar facet of talus.
- f. masticatoria SYN: denture occlusal surface.
- f. maxillaris alaris majoris ossis sphenoidalis SYN: maxillary surface of greater wing of sphenoid bone.
- f. maxillaris ossis palatini SYN: maxillary surface of palatine bone.
- f. medialis SYN: medial surface.
- f. medialis cartilaginis arytenoideae SYN: medial surface of arytenoid cartilage.
- f. medialis digiti pedis SYN: medial surface of toes.
- f. medialis fibulae SYN: medial surface of fibula.
- f. medialis hemispherii cerebri SYN: medial surface of cerebral hemisphere.
- f. medialis ovarii SYN: medial surface of ovary.
- f. medialis pulmonis SYN: mediastinal surface of lung.
- f. medialis testis SYN: medial surface of testis.
- f. medialis tibiae SYN: medial surface of tibia.
- f. medialis ulnae SYN: medial surface of ulna.
- f. mediastinalis pulmonis SYN: mediastinal surface of lung.
- f. mesialis dentis SYN: mesial surface of tooth.
- mitral f. the pink, slightly flushed cheeks of patients with mitral valve disease; nonspecific.
- moon f. roundness of the face due to increased fat deposition laterally seen in patients with hyperadrenocorticalism, either of endogenous ( e.g., Cushing disease) or exogenous origin, such as the use of cortisone-like drugs as therapy.
- myasthenic f. the facial expression in myasthenia gravis, caused by drooping of the eyelids and corners of the mouth, and weakness of the muscles of the face.
- myopathic f. facial appearance of some patients with myopathies and with myasthenia gravis, consisting of bilateral ptosis and inability to elevate the corners of the mouth, due to muscle weakness.
- f. nasalis maxillae SYN: nasal surface of maxilla.
- f. nasalis ossis palatini SYN: nasal surface of palatine bone.
- f. occlusalis dentis SYN: denture occlusal surface.
- f. orbitalis SYN: orbital surface.
- f. palatina laminae horizontalis ossis palatini SYN: palatine surface of horizontal plate of palatine bone.
- f. palmares digitorum SYN: palmar surfaces of fingers, under surface.
- f. pancreatica splenica
- Parkinson f. the expressionless or masklike f. characteristic of parkinsonism (1). SYN: masklike face.
- f. patellaris femoris SYN: patellar surface of femur.
- f. pelvica ossis sacri SYN: pelvic surface of sacrum.
- f. poplitea femoris SYN: popliteal surface of femur.
- f. posterior SYN: posterior surface.
- f. posterior cartilaginis arytenoideae SYN: posterior surface of arytenoid cartilage.
- f. posterior corneae SYN: posterior surface of cornea.
- f. posterior corporis humeri SYN: posterior surface of shaft of humerus.
- f. posterior cruris SYN: posterior region of leg.
- f. posterior fibulae SYN: posterior surface of fibula.
- f. posterior glandulae suprarenalis SYN: posterior surface of suprarenal gland.
- f. posterior iridis SYN: posterior surface of iris.
- f. posterior lentis SYN: posterior surface of lens.
- f. posterior membri inferioris SYN: posterior surface of lower limb.
- f. posterior palpebrarum SYN: posterior surface of eyelids.
- f. posterior pancreatis SYN: posterior surface of pancreas.
- f. posterior partis petrosae ossis temporalis SYN: posterior surface of petrous part of temporal bone.
- f. posterior prostatae SYN: posterior surface of prostate.
- f. posterior radii SYN: posterior surface of radius.
- f. posterior renis SYN: posterior surface of kidney.
- f. posterior scapulae
- f. posterior tibiae SYN: posterior surface of tibia.
- f. posterior ulnae SYN: posterior surface of ulna.
- Potter f. characteristic f. seen in bilateral renal agenesis and other severe renal malformations, exhibiting ocular hypertelorism, low-set ears, receding chin, and flattening of the nose. SEE ALSO: Potter syndrome. SYN: Potter disease.
- f. pulmonales cordis dextra/sinistra SYN: right/left pulmonary surfaces of heart, under surface.
- f. pulmonales cordis dextra/sinistra
- f. renalis glandulae suprarenalis SYN: renal surface of suprarenal gland.
- f. renalis lienis renal impression of spleen.
- f. renalis splenis SYN: renal impression of spleen.
- f. sacropelvina ossis ilii SYN: sacropelvic surface of ilium.
- f. scaphoidea a facial malformation characterized by protuberant forehead, depressed nose and maxilla, and prominent chin. SYN: dish face.
- f. sternocostalis cordis SYN: sternocostal surface of heart.
- f. superior hemispherii cerebelli SYN: superior surface of cerebellar hemisphere.
- f. superior tali SYN: superior facet of trochlear of talus.
- f. superolateralis hemispherii cerebri SYN: superolateral surface of cerebrum.
- f. symphysialis SYN: symphysial surface of pubis.
- f. temporalis SYN: temporal surface.
- f. urethralis penis SYN: urethral surface of penis.
- f. vesicalis uteri SYN: vesical surface of uterus.
- f. vestibularis dentis SYN: vestibular surface of tooth.
- f. visceralis hepatis SYN: visceral surface of liver.
f. visceralis splenis SYN: visceral surface of the spleen. SEE ALSO: colic impression of spleen, gastric impression on spleen, renal impression of spleen.
facilitation (fa-sil′i-ta′shun)
Enhancement or reinforcement of a reflex or other nervous activity by the arrival at the reflex center of other excitatory impulses. [L. facilitas, fr. facilis, easy]
Wedensky f. the arrival of an impulse at a blocked zone, enhancing the excitability of the nerve beyond the block and indicating that the neuromuscular preparation distal to the block has been changed even though the enhancing stimulus is not conducted through the blocked zone.
facing (fas′ing)
A tooth-colored material (usually plastic or porcelain) used to hide the buccal or labial surface of a metal crown to give the outward appearance of a natural tooth.
facio-
The face. SEE ALSO: prosopo-. [L. facies]
faciolingual (fa′she-o-ling′gwal)
Relating to the face and the tongue, often denoting a paralysis affecting these parts.
facioplasty (fa′she-o-plas-te)
Plastic surgery involving the face. [facio- + G. plastos, formed]
facioplegia (fa′she-o-ple′je-a)
SYN: facial paralysis. [facio- + G. plege, a stroke]
F.A.C.N.M.
Abbreviation for Fellow of the American College of Nuclear Medicine.
F.A.C.N.P.
Abbreviation for Fellow of the American College of Nuclear Physicians.
F.A.C.O.G.
Abbreviation for Fellow of the American College of Obstetricians and Gynecologists.
F.A.C.P.
Abbreviation for Fellow of the American College of Physicians, or of Prosthodontists.
F.A.C.R.
Abbreviation for Fellow of the American College of Radiology.
FACS
Abbreviation for fluorescence-activated cell sorter.
F.A.C.S.
Abbreviation for Fellow of the American College of Surgeons.
F.A.C.S.M.
Abbreviation for Fellow of the American College of Sports Medicine.
F-actin
See under actin.
factitious (fak-tish′us)
Artificial; self-induced; not naturally occurring. [L. factitius, made by art, fr. facio, to make]
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