| homopolar generator | <physics> A direct-current generator in which the poles presented to the armature are all of the same polarity, so that the voltage generated in the active conductors has the same polarity at all times. A pure direct current is thus produced without commutation. (09 Oct 1997) |
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| homopolic | <biology> In promorphology, pertaining to or exhibiting that kind of organic form, in which the stereometric ground form is a pyramid, with similar poles. See Promorphology. Origin: Homo- + pole. Source: Websters Dictionary (01 Mar 1998) |
| homopolymer | <chemistry> A type of polymer (large molecule which consists of a chain of similar smaller molecules called monomers) where all of the monomers are the same thing. For example: a polypeptide which consists entirely of the amino acid lysine linked end to end, instead of many different amino acids linked end to end, would be a homopolymer. (09 Oct 1997) |
| homopolymer tailing | A lab technique where a nucleic acid homopolymer (a long chain of the same nucleotide over and over) is attached to the end of a piece of DNA as a part of DNA cloning. It is especially useful in cDNA cloning to get the cDNA inserted into the cloning vector -- a nucleic acid homopolymer which contains the complementary nucleotide to the cDNA tail is attached to the vector, which then pairs with the tail on the cDNA. (09 Oct 1997) |
| homopolysaccharide | <biochemistry> A polysaccharide made up of only one kind of simple sugar. (09 Oct 1997) |
| homoproline | Dihydrobaikiaine; 2-piperidinecarboxylic acid; saturated picolinic acid;the l-isomers of the d1-and d6-dehydropipecolic acids are intermediates in the catabolism of l-lysine; pipecolic acid accumulates in disorders of the peroxisomes. Synonym: homoproline, pipecolinic acid. (05 Mar 2000) |
| homoprotocatechuic acid | (3,4-Dihydroxyphenyl)acetic acid;an isomer of homogentisic acid found in urine; a degradation product of l-tyrosine, l-dopa, and hydroxytyramine. (05 Mar 2000) |
| homopter | <zoology> One of the Homoptera. Source: Websters Dictionary (01 Mar 1998) |
| homoptera | <zoology> A suborder of Hemiptera, in which both pairs of wings are similar in texture, and do not overlap when folded, as in the cicada. See Hemiptera. Origin: NL, fr. Gr. The same, like + wing. Source: Websters Dictionary (01 Mar 1998) |
| homopteran | <zoology> An homopter. Source: Websters Dictionary (01 Mar 1998) |
| homopterous | <zoology> Of or pertaining to the Homoptera. Source: Websters Dictionary (01 Mar 1998) |
| homorganic | Produced by the same organs, or by homologous organs. (05 Mar 2000) |
| homosalate | 3,3,5-Trimethylcyclohexyl salicylate;an ultraviolet screening agent for topical application to the skin. (05 Mar 2000) |
| homoscedasticity | Constancy of the variance of a measure over the levels of the factor under study. (05 Mar 2000) |
| homoserine | An amino acid which is used by plants and bacteria to make methionine, threonine, and isoleucine (three of the twenty amino acids used to make proteins). Homoserine is similar to the amino acid serine (another of the twenty amino acids used to make proteins), except it has an extra methylene group. It is also formed when cystathionine is metabolised into the amino acid cysteine (another of the twenty amino acids used to make proteins). (09 Oct 1997) |
| Homo |
A genus of hominids characterized by large brain size and dependence on culture as a means of adaptation.
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| Homo sapiens |
(ho9mow say9pee-ens)The taxonomic name for modern humans. There is debate as to whether or not this name covers certain other species, including H. erectus, ergaster, antecessor, heidelbergensis, and neanderthalensis.
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| homo- |
A genus of hominids characterized by large brain size and dependence on culture as a means of adaptation.
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| homogeneous system |
A system that has the same properties everywhere within the system.
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| homologous organs |
Organs in the male and female that develop from the same embryonic tissue.
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