| homing behaviour | Instinctual patterns of activity related to a specific area including ability of certain animals to return to a given place when displaced from it, often over great distances using navigational clues such as those used in migration. (12 Dec 1998) |
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| homing value | In a cybernetic system such as homeostasis, that value of a trait of interest that the restorative forces are directed towards maintaining. (05 Mar 2000) |
| hominidae | Family of the suborder haplorhini (anthropoidea). It includes homo sapiens (modern man), the only human species still in existence. (12 Dec 1998) |
| Hominoidea | A superfamily of the Primates including the anthropoid apes and man. Divided into the families Pongidae (anthropoid apes) and Hominidae (humans). Origin: L. Homo (homin-), man, + G. Eidos, form (05 Mar 2000) |
| Homo | 1. <zoology> The genus of Primates that includes humans. Homo sapiens, modern human beings. Origin: L. Man 2. <prefix> Combining form meaning the same, alike; opposite of hetero-. 3. <chemistry> A prefix used to indicate insertion of one more carbon atom in a chain (i.e., insertion of a methylene moiety). Origin: G. Homos, the same (21 Jun 2000) |
| homoaconitate hydratase | <enzyme> Catalyses conversion of 2-hydroxybutane-1,2,4-tricarboxylic acid to but-1-ene-1,2,4-tricarboxylic acid; isolated from aspergillus nidulans. Registry number: EC 4.2.1.36 Synonym: 2-hydroxybutane-1,2,4-tricarboxylate hydro-lyase, lysf gene product, homoaconitase (26 Jun 1999) |
| homoarginine | <chemical> Chemical name: L-Lysine, N(6)-(aminoiminomethyl)- (12 Dec 1998) |
| homobiotin | A compound resembling biotin except for the substitution of an oxygen atom for the sulfur and the presence of an additional CH2 group in the side chain; an active biotin antagonist. (05 Mar 2000) |
| homoblastic | Developing from a single type of tissue. Origin: homo-+ G. Blastos, germ (05 Mar 2000) |
| homocarnosine | A molecule normally found within the brain. Homocarnosine is composed of two amino acids joined together with a peptide bond (a dipeptide). (09 Oct 1997) |
| homocarnosinosis | An inborn error in metabolism in which homocarnosine levels are elevated, particularly in the cerebral spinal fluid. (05 Mar 2000) |
| homocategoric | <biology> Belonging to the same category of individuality; a morphological term applied to organisms so related. Origin: Homo- + categoric. Source: Websters Dictionary (01 Mar 1998) |
| homocentric | Having the same centre; denoting rays that meet at a common focus. Compare: heterocentric. (05 Mar 2000) |
| homocercal | <zoology> Having the tail nearly or quite symmetrical, the vertebral column terminating near its base; opposed to heterocercal. Origin: Homo- + Gr. Tail. Source: Websters Dictionary (01 Mar 1998) |
| homocercy | <zoology> The possession of a homocercal tail. Source: Websters Dictionary (01 Mar 1998) |