| haustorium |
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noun (haustoria)
- A root of a parasitic plant modified to take nourishment from its host.
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| heliotropic |
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adjective - Exhibiting heliotropism
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| heliotropism |
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noun
- The property of some plants of turning under the influence of light; either positively (towards the light) or negatively (away from the light)
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| helminthoid |
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adjective
- (medicine) vermicular; wormlike
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| herpetology |
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noun her"pe"tol"o"gy
- the branch of biology dealing with reptiles (Reptilia)] or amphibians.
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| heterogenous |
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adjective - (genetics) derived from a different individual or species
- (alternative spelling of, heterogeneous)
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| heterologous |
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adjective
- Having different relationships or different elements
- (biology) Of, or relating to different species
- heterologous blood donation
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| histologist |
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noun
- (biology) One who study, studies histology.
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| histology |
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noun
- (biology) The study of the structure, chemical composition and function of the tissue or tissue systems of plants and animals
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| holotype |
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noun
- The single physical example (or illustration) of an organism, known to be used when the taxon was formally described.
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| homogenous |
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adjective - (biology) Having the same genetic structure; exhibiting homogeny
- Having the same consistency and contents throughout; uniform or homogeneous
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| homogeny |
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noun - (biology) Similarity in structure, though of different function, because of genetic relationships
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| homonym |
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noun
- A word that sounds or is spelled the same as another word but has a different meaning.
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| homotypic |
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adjective
- (botany) literally "with the same type". In botanical nomenclature a homotypic synonym (or nomenclatural synonym) is a synonym that comes into being through a nomenclatural act
- when a taxon gets a new name, without being included in another taxon (of the same rank). The old name becomes a homotypic synonym of the new name.
- when a new name for a taxon is coined without displacing the existing name, the new name becomes a homotypic synonym.
:The zoological equivalent is "objective synonym".
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| homozygous |
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adjective
- of an organism in which both copies of a given gene have the same allele
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