| heteronymous hemianopia | Attitudinal hemianopia involving the upper field of one eye and the lower field of the other; or a binasal or bitemporal hemianopia. Synonym: crossed hemianopia. (05 Mar 2000) |
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| heteronymous image | A double image in physiological diplopia, when fixation is directed beyond an object; the right image arises from the left eye, while the left image arises from the right eye; i.e., there is a crossed diplopia. (05 Mar 2000) |
| heteronymous parallax | The apparent movement of an object toward the closed eye; noted in exophoria. (05 Mar 2000) |
| heteropagus | Unequal conjoined twins in which the imperfectly developed parasite is attached to the ventral portion of the autosite. See: conjoined twins. See: epigastrius. Origin: hetero-+ G. Pagos, fixed (05 Mar 2000) |
| heteropathy | <medicine> That mode of treating diseases, by which a morbid condition is removed by inducing an opposite morbid condition to supplant it; allopathy. See: Heteropathic. Source: Websters Dictionary (01 Mar 1998) |
| heteropelmous | <anatomy> Having each of the two flexor tendons of the toes bifid, the branches of one going to the first and second toes; those of the other, to the third and fourth toes. Origin: Hetero- + Gr. The sole of the foot. Source: Websters Dictionary (01 Mar 1998) |
| heterophagi | <zoology> Altrices. Origin: NL, fr. Gr. Other + to eat. Source: Websters Dictionary (01 Mar 1998) |
| heterophagy | Digestion within a cell of an exogenous substance phagocytosed from the cell's environment. Origin: hetero-+ G. Phagein, to eat (05 Mar 2000) |
| heterophasia | Synonym: heterolalia. Origin: hetero-+ G. Phasis, speech (05 Mar 2000) |
| heterophemia | Heterophemy Synonym: heterolalia. Origin: hetero-+ G. Pheme, a speech (05 Mar 2000) |
| heterophil | Heterophile 1. The neutrophilic leukocyte in man; in some animals the granules vary in size and staining reaction. 2. Pertaining to heterogenetic antigens occurring in different species or to antibodies directed against such antigens. Origin: hetero-+ G. Philos, fond (05 Mar 2000) |
| heterophil antibody | A heterogenetic antibody specific for the Forssman group of heterogenetic antigens. Synonym: heterophil antibody, heterophile antibody. (05 Mar 2000) |
| heterophil antigen | An antigen which is possessed by a variety of different phylogenetically unrelated species; e.g., the various organ-or tissue-specific antigen's, the alpha-and beta-crystalline protein of the lens of the eye, and Forssman antigen. Synonym: heterophil antigen. (05 Mar 2000) |
| heterophil haemolysin | A sensitizing antibody that can combine with red blood cells of various species (in addition to those used as the antigen in stimulating the formation of the haemolysin), resulting in haemolysis when the proper amount of complement is present. (05 Mar 2000) |
| heterophile antibody | <immunology> An antibody raised against an antigen from one species that also reacts against antigens from other species. Also used of Forssman type systems where antibody against antigens from a variety of species is present without immunisation. (18 Nov 1997) |
| heterozygous |
A term describing a diploid organism having different alleles of one or more genes and therefore producing gametes of different genotypes.
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| heterozygosity |
The proportion of individuals heterozygous at a locus; the state of being heterozygous. See also heterozygous.
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| heterochromatin |
Chromatin that remains condensed throughout the cell cycle and is generally inactive.
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| heteroplasmy |
Extranuclear inheritence, usually in reference to the inheritence of mtDNA from the father.
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| heterosis |
The phenomenon in which the heterozygous genotypes with respect to one or more characters are superior in comparison with the corresponding homozygous genotypes in terms of growth, survival, phenotypic expression, and fertility.
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