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Medical Dictionary


hemihyperesthesia (hem′e-hi′per-es-the′ze-a)
Hyperesthesia, or increased tactile and painful sensibility, affecting one side of the body.

hemihyperhidrosis (hem′e-hi-per-hi-dro′sis)
Excessive sweating confined to one side of the body. [hemi- + G. hyper, over, + hidrosis, sweating]

hemihypertonia (hem′e-hi-per-to′ne-a)
Exaggerated muscular tonicity on one side of the body. [hemi- + G. hyper, over, + tonos, tone]

hemihypertrophy (hem′e-hi-per′tro-fe)
Muscular or osseous hypertrophy of one side of the face or body.

hemihypesthesia (hem′e-hi-pes-the′ze-a)
Diminished sensibility in one side of the body. SYN: hemihypoesthesia. [hemi- + G. hypo, under, + aestheses, sensation]

hemihypoesthesia (hem′e-hi-po-es-the′ze-a)
SYN: hemihypesthesia. [hemi- + G. hypo, under, + aistheses, sensation]

hemihypotonia (hem′e-hi-po-to′ne-a)
Partial loss of muscular tonicity on one side of the body. [hemi- + G. hypo, under, + tonos, tone]

hemikaryon (hem-i-kar′i-on)
A cell nucleus containing a haploid set of chromosomes. [hemi- + G. karyon, nut (nucleus)]

hemiketal (hem′e-ke-tal)
RC(R′)(OH)OR&dprime;, a product of the addition of an alcohol to a ketone. In the ketose sugars, the h. formation is from an attack by an internal OH on the ketone carbonyl leading to intramolecular cyclization (furanose or pyranose); the h. forms of the sugars are involved in polysaccharide formation, as glycosyls or glycosides. SEE ALSO: hemiacetal, ketal.

hemilaminectomy (hem′e-lam-i-nek′to-me)
Removal of a portion of a vertebral lamina, usually performed for exploration of, access to, or decompression of the intraspinal contents. [hemi- + L. lamina, layer, + G. ektome, excision]

hemilaryngectomy (hem′e-lar-in-jek′to-me)
Excision of one lateral half of the larynx. [hemi- + G. larnyx (laryng-), larynx, + ektome, excision]

hemilateral (hem-e-lat′er-al)
Relating to one lateral half.

hemilesion (hem-e-le′zhun)
A unilateral lesion.

hemilingual (hem-e-ling′gwal)
Relating to one lateral half of the tongue. SYN: hemiglossal. [hemi- + L. lingua, tongue]

hemimacroglossia (hem′e-mak′ro-glos′e-a)
Enlargement of half the tongue. [hemi- + G. makros, large, + glossa, tongue]

hemimandibulectomy (hem′e-man-dib′u-lek′to-me)
Resection of one-half of the mandible.

hemimelia (hem-e-mel′e-a)
Congenital partial absence of a part of an extremity; for example, absence of the fibula and presence of the tibia. [hemi- + G. melos,limb, + -ia]

hemimetabolous (hem′e-me-tab′o-lus)
Pertaining to a member of the series of insect orders, the Hemimetabola, in which simple or incomplete metamorphosis is found. [hemi- + G. metabole, change]

hemin (hem′in)
1. Chloride of heme in which Fe2+ has become Fe3+. H. crystals are called Teichmann crystals, under crystal. 2. Any coordination complex of chloro(porphyrinato)iron(III). SYN: chlorohemin, factor X for Haemophilus, ferriheme chloride, ferriporphyrin chloride, ferriprotoporphyrin, hematin chloride.

hemiopalgia (hem′e-o-pal′je-a)
Pain in one eye, usually accompanied by hemicrania. [hemi- + G. ops, eye, + algos, pain]

hemipagus (hem-ip′a-gus)
Conjoined twins that are united laterally at the thorax; the zone of union may also involve the neck and jaws. See conjoined twins, under twin. [hemi- + G. pagos, something fixed]

hemipancreatectomy (hem′e-pan′-kre-a- tek′to-me)
Surgical resection of half of the pancreas.

hemiparesis (hem-e-pa-re′sis, -par′e-sis)
Weakness affecting one side of the body.

hemipelvectomy (hem′e-pel-vek′to-me)
Amputation of an entire lower extremity together with a portion of the ipsilateral pelvis. SYN: hindquarter amputation, Jaboulay amputation. [hemi- + L. pelvis, basin (pelvis), + G. ektome, excision]

hemiplegia (hem-e-ple′je-a)
Paralysis of one side of the body. [hemi- + G. plege, a stroke] alternating h. h. on one side with contralateral cranial nerve palsies. SYN: crossed h., crossed paralysis. contralateral h. paralysis occurring on the side opposite to the causal central lesion. crossed h. SYN: alternating h.. double h. SYN: diplegia. facial h. paralysis of one side of the face, the muscles of the extremities being unaffected. infantile h. acute hemiparesis that occurs in infancy and is usually caused by a vascular accident such as cerebral infarction or thrombosis; frequently associated with seizures. spastic h. a h. with increased tone in the antigravity muscles of the affected side.

hemiplegic (hem-e-ple′jik)
Relating to hemiplegia.

Hemiptera (hem-ip′ter-a)
An arthropod order of the class Insecta that includes many plant lice and other true bugs; those of the subfamily Triatominae are bloodsuckers and of medical importance. The best known species is Cimex lectularius, the common bedbug. [hemi- + G. pteron, wing]

hemisection (hem-e-sek′shun)
Surgical removal of a root and its related coronal portion of a multirooted tooth.

hemisensory (hem′e-sen′sor-e)
Loss of sensation on one side of the body. Cf.:hemianesthesia.

hemiseptum (hem-e-sep′tum)
A lateral half of any septum.

hemispasm (hem′e-spazm)
A spasm affecting one or more muscles of one side of the face or body.

hemisphere (hem′i-sfer) [TA]
Half of a spherical structure. SYN: cerebral h. (1) [TA] . [hemi- + G. sphaira, ball, globe] h. of bulb of penis one of the lateral halves of the bulb of the penis that are separated by a median groove on the posterior part of the undersurface. SYN: hemispherium bulbi urethrae. h. of cerebellum SYN: h. of cerebellum HII–HX. h. of cerebellum HII–HX the large part of the cerebellum lateral to the vermis cerebelli. SYN: hemispherium cerebelli [HII–HX] [TA] , hemispherium (2) [TA] , h. of cerebellum, hemisphericum cerebelli HII–HX, hemisphericum. cerebral h. [TA] 1. SYN: h.. 2. the large mass of the telencephalon, on either side of the midline, consisting of the cerebral cortex and its associated fiber systems, together with the deeper-lying subcortical telencephalic nuclei ( i.e., basal ganglia [nuclei]). SYN: hemispherium cerebri [TA] , hemispherium (1) [TA] . dominant h. that cerebral h. containing the representation of speech and controlling the arm and leg used preferentially in skilled movements; usually the left h..

hemispherectomy (hem′e-sfer-ek′to-me)
Excision of one cerebral hemisphere; undertaken for malignant tumors, intractable epilepsy usually associated with infantile hemiplegia due to birth injury, and other cerebral conditions.

SYN: hemisphere of cerebellum HII–HX. h. cerebelli HII–HX SYN: hemisphere of cerebellum HII–HX.

hemispherium (hem′i-sfer′e-um) [TA]
1. SYN: cerebral hemisphere. 2. SYN: hemisphere of cerebellum HII–HX. [G. hemisphairion] h. bulbi urethrae SYN: hemisphere of bulb of penis. h. cerebelli [HII–HX] [TA] SYN: hemisphere of cerebellum HII–HX. h. cerebri [TA] SYN: cerebral hemisphere.

Hemispora (hem′e-spo′ra)
Generic name for certain species of Fungi Imperfecti in which chains of conidia develop from tubular structures that form as the result of a constriction at the end of each of a series of short hyphal branches; close septations divide the contents of the tube into relatively square, thick-walled, deeply staining segments that eventually separate and become rounded, thick-walled spores with rough surfaces. H. organisms occur fairly frequently as contaminants in cultures for other fungi; they are usually regarded as nonpathogenic forms, but there are a few reported instances in which they were apparently the causal agents of disease. [hemi- + G. sporos, seed]

hemistrumectomy (hem′e-stroo-mek′to-me)
Rarely used term for excision of approximately one-half of a goiter. [hemi- + L. struma, + G. ektome, excision]

hemisubstance (hem′e-sub′stans)
An amorphous substance found in cell walls.

hemisyndrome (hem′e-sin-drom)
1. A condition in which one-half of the body is atrophied or hypertrophied. 2. Unilateral lesion of the spinal cord.

hemiterpene (hem-e-ter′pen)
Isoprene or a derivative of a single isoprene.

hemithermoanesthesia (hem′e-ther′mo-an-es-the′ze-a)
Loss of sensibility to heat and cold affecting one side of the body.

hemithorax (hem-e-tho′raks)
One side of the thorax.

hemitremor (hem′e-trem′er, -tre′mer)
Tremor affecting the muscles of one side of the body.

hemitruncus (hem′e-trunk′us)
A variant truncus arteriosus in which only one pulmonary artery originates from the truncal artery.

hemivertebra (hem-e-ver′te-bra)
A congenital defect of the spine in which one side of a vertebra fails to develop completely.

hemizygosity (hem′i-zi-gos′i-te)
The state of being hemizygous.

hemizygote (hem-i-zi′got)
An individual hemizygous with respect to one or more specified loci; e.g., a normal male is a h. with respect to the gene for all X-linked or Y-linked genes in his genome. [hemi- + G. zygotos, yoked]

hemizygotic (hem′i-zi-got′ik)
SYN: hemizygous.

hemizygous (hem-i-zi′gus)
Having unpaired genes in an otherwise diploid cell; males are normally h. for genes on both sex chromosomes. SYN: hemizygotic.

hemlock (hem′lok)
SYN: conium.

Combining form denoting blood. SEE ALSO: hem-, hemat-, hemato-. [G. haima]

hemoagglutination (he′mo-a-gloo′ti-na′shun)
SYN: hemagglutination.

hemoagglutinin (he′mo-a-gloo′ti-nin)
SYN: hemagglutinin.

hemoantitoxin (he′mo-an-ti-tok′sin)
An antibody that neutralizes the effects of a hemotoxin, such as the hemolytic material in cobra venom.

hemobilia (he-mo-bil′e-a)
Bleeding into the biliary passages, usually as a result of hepatic trauma or a neoplasm in the liver or biliary tract. SYN: hematobilia.

hemoblast (hem′o-blast)
SYN: hemocytoblast. lymphoid h. of Pappenheim obsolete term for pronormoblast. SEE ALSO: erythroblast.

hemoblastosis (he′mo-blas-to′sis)
A proliferative condition of the hematopoietic tissues in general.

hemocatharsis (he′mo-ka-thar′sis)
Cleansing the blood. [hemo- + G. katharsis, a cleansing]

hemocatheresis (he′mo-kath-e-re′sis)
Destruction of the blood cells, especially of erythrocytes (hemocytocatheresis). [hemo- + G. kathairesis, destruction]

hemocatheretic (he′mo-kath-e-ret′ik)
Pertaining to or characterized by hemocatheresis.

hemocele (he′mo-sel)
The system of blood-containing spaces pervading the body in arthropods. [hemo- + G. koiloma, cavity]

hemocholecystitis (he′mo-ko′le-sis-ti′tis)
Hemorrhagic cholecystitis.

hemochromatosis (he′mo-kro-ma-to′sis)
A disorder of iron metabolism characterized by excessive absorption of ingested iron, saturation of iron-binding protein, and deposition of hemosiderin in tissue, particularly in the liver, pancreas, and skin; cirrhosis of the liver, diabetes (bronze diabetes), bronze pigmentation of the skin, and, eventually heart failure may occur; also can result from administration of large amounts of iron orally, by injection, or in forms of blood transfusion therapy. [hemo- + G. chroma, color, + -osis, condition] exogenous h. hemosiderosis due to repeated blood transfusions; it can progress to pigmentary cirrhosis. primary h. [MIM*235200] a specific inherited metabolic defect with increased absorption and accumulation of iron on a normal diet; autosomal recessive inheritance caused by a mutation in the h. gene (HFE) on 6p, less florid in females; juvenile h. may represent a homozygous state of the same gene. secondary h. increased intake and accumulation of iron secondary to known cause, such as oral iron therapy or multiple transfusions.

hemochrome (he′mo-krom)
SYN: hemochromogen.

hemochromogen (he-mo-kro′mo-jen)
Term originally used for combinations of ferro- or ferriporphyrins with 2 mol of a nitrogenous base or protein, e.g., pyridine ferroporphyrin. SYN: hemochrome. [hemo- + G. chroma, color, + -gen, producing]

hemoclasis, hemoclasia (he-mok′la-sis, he′mo-kla′ze-a)
Rupture, dissolution (hemolysis), or other type of destruction of red blood cells. [hemo- + G. klasis, a breaking]

hemoclastic (he′mo-klas′tik)
Pertaining to hemoclasis.

hemoconcentration (he′mo-kon-sen-tra′shun)
Decrease in the volume of plasma in relation to the number of red blood cells; increase in the concentration of red blood cells in the circulating blood.

hemoconia (he-mo-ko′ne-a)
An obsolete term for small refractive particles in the circulating blood, probably lipid material associated with fragmented stroma from red blood cells. SYN: blood dust, blood motes, dust corpuscles. [hemo- + G. konis, dust]

hemoconiosis (he′mo-ko-ne-o′sis)
A condition in which there is an abnormal amount of hemoconia in the blood.


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