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Medical Dictionary - Dictionary of Medicine and Human Biology

Medical Dictionary


heterochron (het′er-o-kron)
Having varying chronaxies. [hetero- + G. chronos, time]

heterochronia (het-er-o-kro′ne-a)
Origin or development of tissues or organs at an unusual time or out of the regular sequence. Cf.:synchronia. [hetero- + G. chronos, time]

heterochronic (het-er-o-kron′ik)
SYN: heterochronous.

heterochronous (het-er-ok′ro-nus)
Relating to heterochronia. SYN: heterochronic.

heterocladic (het′er-o-klad′ik)
Denoting an anastomosis between branches of different arterial trunks, as distinguished from homocladic. [hetero- + G. klados, a twig]

heterocrine (het′er-o-krin)
Denoting the secretion of two or more kinds of material. [hetero- + G. krino, to separate]

heterocrisis (het′er-o-kri′sis)
Rarely used term for an irregular crisis, one occurring at an abnormal time or with unusual symptoms.

heterocytotropic (het′er-o-si′to-trop′ik)
Having an affinity for cells of a different species. [hetero- + G. kytos, cell, + trope, a turning toward]

heterodisperse (het′er-o-dis-pers′)
Of varying size; describing aerosols whose particles are not uniform in size.

heterodont (het′er-o-dont)
Having teeth of varying shapes, such as those of humans and the majority of mammals, in contrast to homodont. [hetero- + G. odous, tooth]

Heterodoxus spiniger (het-er-o-dok′sus spi′ni-ger)
A biting louse of the dog, sometimes called the kangaroo louse.

heterodromous (het-er-od′ro-mus)
Moving in the opposite direction. [hetero- + G. dromos, running]

heteroduplex (het′er-o-doo′pleks)
1. A DNA molecule, the two constitutive strands of which derive from distinct sources and hence are likely to be somewhat mismatched. 2. A DNA-RNA hybrid. [hetero- + L. duplex, two-fold]

heterodymus (het-er-od′i-mus)
Unequal conjoined twins in which the incomplete parasite, consisting of head and neck and, to some extent, thorax, is attached to the anterior surface of the autosite. See conjoined twins, under twin. [hetero- + G. didymos, twin]

heteroeroticism (het′er-o-e-rot′i-sism)
A condition of sexual excitement brought about by congress with a person of the opposite sex.

heterogametic (het′er-o-ga-met′ik)
Having sex gametes of contrasting types; human males are h.. SYN: digametic. [hetero- + G. gametikos, connubial]

heterogamous (het-er-og′a-mus)
Relating to heterogamy.

heterogamy (het-er-og′a-me)
1. Conjugation of unlike gametes. 2. Bearing different types of flowers. 3. Reproduction by indirect methods of pollination. [hetero- + G. gamos, marriage]

heterogeneity (het′er-o-je-ne′i-te)
Heterogeneous state or quality. genetic h. the character of a phenotype produced by mutation at more than one gene or by more than one genetic mechanism. See genocopy.

heterogeneous (het′er-o-je′ne-us)
Comprising elements with various and dissimilar properties.

heterogenesis (het′er-o-jen′e-sis)
1. Alternation of generations. 2. SYN: asexual generation. 3. SYN: spontaneous generation. [hetero- + G. genesis, production]

heterogenetic (het′er-o-je-net′ik)
Relating to heterogenesis.

heterogenic, heterogeneic (het′er-o-jen′ik, -je-ne′ik)
Having different gene constitutions, especially in diverse species.

heterogenote (het′er-o-je′not)
In microbial genetics, an organism that contains exogenous genetic material that differs somewhat from the corresponding region of its own original genome, but in a very limited way resembles a heterozygote.

heterogenous (het-er-oj′e-nus)
Of foreign origin. Commonly confused with heterogeneous.

heteroglycan (het′er-o-gli′kan)
SYN: heteropolysaccharide.

heterograft (het′er-o-graft)
SYN: xenograft.

heterokaryon (het′er-o-kar′e-on)
A cell containing diverse nuclei inside a common cytoplasm, usually resulting from the artificial fusion of two cells from different species. [hetero- + G. karyon, kernel, nut]

heterokaryotic (het′er-o-kar-e-ot′ik)
Exhibiting the properties of a heterokaryon.

heterokeratoplasty (het′er-o-ker′a-to-plas-te)
Keratoplasty in which the cornea from one species of animal is grafted to the eye of another species.

heterokinesia (het′er-o-ki-ne′ze-a)
Executing movements the reverse of those one is told to make. SYN: heterokinesis (2) . [hetero- + G. kinesis, movement]

heterokinesis (het′er-o-ki-ne′sis)
1. Differential distribution of X and Y chromosomes during meiotic cell division. 2. SYN: heterokinesia. [hetero- + G. kinesis, movement hetero- + G. kinesis, movement]

heterolateral (het′er-o-lat′er-al)
SYN: contralateral. [hetero- + L. latus, side]

heterolipids (het′er-o-lip′idz)
1. Lipids containing N and P atoms in addition to the usual C, H, and O. 2. Any complex lipids. Cf.:homolipids.

heteroliteral (het′er-o-lit′er-al)
Substitution of one letter for another in the pronunciation of certain words. [hetero- + L. littera, letter]

heterologous (het-er-ol′o-gus)
1. Pertaining to cytologic or histologic elements occurring where they are not normally found. SEE ALSO: xenogeneic. 2. Derived from an animal of a different species, as the serum of a horse is h. for a rabbit. [hetero- + G. logos, ratio, relation]

heterology (het-er-ol′o-je)
A departure from the normal in structure, arrangement, or mode or time of development.

heterolysin (het-er-ol′i-sin)
A lysin that is formed in one species of animal and manifests lytic activity on the cells of a different species.

heterolysis (het-er-ol′i-sis)
Dissolution or digestion of cells or protein components from one species by a lytic agent from a different species. [hetero- + G. lysis, a loosening]

heterolytic (het′er-o-lit′ik)
Pertaining to heterolysis or to the effect of a heterolysin.

heteromastigote (het-er-o-mas′ti-got)
A flagellate having two flagella, one anterior and one posterior. [hetero- + G. mastix, a whip]

heteromeral (het′er-om′er-al)
SYN: heteromeric (2) .

heteromeric (het′er-o-mar′ik)
1. Having a different chemical composition. 2. Denoting spinal neurons that have processes passing over to the opposite side of the cord. SYN: heteromeral, heteromerous. [hetero- + G. meros, part]

heteromerous (het′er-om′er-us)
SYN: heteromeric (2) .

heterometabolous (het′er-o-me-tab′o-lus)
Pertaining to a member of the Heterometabola, a superorder sometimes used for a series of insect orders in which incomplete metamorphosis is found. [hetero- + G. metabole, change]

heterometaplasia (het′er-o-met-a-pla′ze-a)
Tissue transformation resulting in production of a tissue foreign to the part where produced.

heterometric (het′er-o-met′rik)
Involving or depending upon a change in size. [hetero- + G. metron, measure]

heterometropia (het′er-o-me-tro′pe-a)
A condition in which the refraction is different in the two eyes. [hetero- + G. metron, measure, + ops, eye]

heteromorphism (het′er-o-morf′izm)
In cytogenetics, a difference of shape or size in metaphase between the two homologous chromosomes. [hetero- + G. morphe, shape]

heteromorphosis (het′er-o-mor-fo′sis)
1. Development of one tissue from a tissue of another kind or type. 2. Embryonic development of tissue or an organ inappropriate to its site. [hetero- + G. morphosis, a molding]

heteromorphous (het′er-o-mor′fus)
Differing from the normal form.

heteronomous (het-er-on′o-mus)
1. Different from the type; abnormal. 2. Subject to the direction or control of another; not self-governing. Cf.:autonomous. [hetero- + G. nomos, law]

heteronomy (het-er-on′o-me)
The condition or state of being heteronomous. [hetero- + G. nomos, law]

heteronuclear (het′er-o-noo′kle-er)
Denoting a heterokaryon that has lost some of the nuclear material of which the cell line was originally constituted.

heteronymous (het-er-on′i-mus)
Having different names or expressed in different terms. [G. heteronymos, having a different name, fr. onyma, or onoma, name]

heteropagus (het-er-op′a-gus)
Unequal conjoined twins in which the imperfectly developed parasite is attached to the ventral portion of the autosite. See conjoined twins, under twin. SEE ALSO: epigastrius. [hetero- + G. pagos, fixed]

heteropathy (het′er-op′a-the)
1. Abnormal sensitivity to stimuli. 2. SYN: allopathy. [hetero- + G. pathos, suffering]

heterophagy (het-er-of′a-je)
Digestion within a cell of an exogenous substance phagocytosed from the cell's environment. [hetero- + G. phago, to eat]

heterophil, heterophile (het′er-o-fil, -fil)
1. Pertaining to heterogenetic or cross-reacting antigens occurring in different species or to antibodies directed against such antigens. 2. The neutrophilic leukocyte in man; in some animals the granules vary in size and staining reaction. [hetero- + G. philos, fond]

heterophonia (het′er-o-fo′ne-a)
1. The change of voice at puberty. 2. Any abnormality in the voice sounds. SYN: heterophthongia. [hetero- + G. phone, voice]

heterophoria (het′er-o-fo′re-a)
A tendency for deviation of the eyes from parallelism, prevented by binocular vision. [hetero- + G. phora, movement]

heterophthalmus (het′er-of-thal′mus)
A seldom-used term for a difference in the appearance of the two eyes, usually due to heterochromia iridis. SYN: allophthalmia. [hetero- + G. ophthalmos, eye]

heterophthongia (het-er-of-thon′je-a)
SYN: heterophonia. [G. heterophthongos, fr. heteros, different, + phthongos, sound, voice]

Heterophyes (het-er-of′i-ez)
A genus of digenetic flukes (family Heterophyidae) parasitic in fish-eating birds and mammals, including man; cercariae from infected snails penetrate and encyst in fish, which are eaten by the final hosts. [hetero- + G. phye, stature, form] H. brevicaeca a species reported in humans in the Philippines and implicated in heart lesions caused by the eggs of this minute fluke, carried from the intestinal mucosa to obstruct coronary capillaries. H. h. the Egyptian intestinal or small intestinal fluke, a species infecting the small intestine and cecum in humans and other fish-eating mammals in Egypt and the Far East. H. katsuradai a species, somewhat smaller than H. h., found in Japan.

heterophyiasis (het′er-o-fi-i′a-sis)
Infection with a heterophyid trematode, particularly Heterophyes heterophyes. SYN: heterophyidiasis.

heterophyid (het′er-o-fi′id)
Common name for a member of the family Heterophyidae.

Heterophyidae (het′er-o-fi′i-de)
A family of tiny fish-borne trematodes, including the genus Heterophyes and its common human parasite, H. heterophyes.

heterophyidiasis (het′er-o-fi-id-i′a-sis)
SYN: heterophyiasis.

heteroplasia (het′er-o-pla′ze-a)
1. Development of cytologic and histologic elements that are not normal for the organ or part in question, as the growth of bone in a site where there is normally fibrous connective tissue. 2. Malposition of tissue or a part that is otherwise normal, as a ureter that develops at the lower pole of a kidney. SYN: alloplasia. [hetero- + G. plasis, a forming]

heteroplastic (het′er-o-plas′tik)
1. Pertaining to or manifesting heteroplasia. 2. Relating to heteroplasty.

heteroplastid (het′er-o-plas′tid)
The graft in heteroplasty.

heteroploid (het′er-o-ployd)
Relating to heteroploidy.


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