| gib-cat | A male cat, especially. An old one. See lst Gib. Source: Websters Dictionary (01 Mar 1998) |
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| Gibb's phase rule | An expression of the relationships existing between systems in equilibrium: P + V = C + 2, where P is the number of phases, V the variance or degrees of freedom, and C the number of components; it also follows that the variance is, V = C + 2 -P. For H2O at its triple point, V = 1 + 2 -3 = 0, i.e., both temperature and pressure are fixed. Synonym: Gibb's phase rule. (05 Mar 2000) |
| gibbartas | <zoology> One of several finback whales of the North Atlantic; called also Jupiter whale. Alternative forms: jubartas, gubertas, dubertus. Origin: Cf. Ar. Jebbar giant; or L. Gibber humpbacked: cf. F. Gibbar. Source: Websters Dictionary (01 Mar 1998) |
| gibberella | A genus of ascomycetous fungi of the family hypocreaceae, order hypocreales including several pathogens of grains and cereals; also the source of plant growth regulators such as gibberellin and gibberellic acid. (12 Dec 1998) |
| gibberellic acid | <plant biology> Diterpenoid compounds with gibberellin activity in plants. at least 70 related gibberellic acids have been described and designated as a series GA1, GA2 etc. (17 Dec 1997) |
| gibberellin | <protein> Plant growth substance (phytohormone) involved in promotion of stem elongation, mobilisation of food reserves in seeds and other processes. Its absence results in the dwarfism of some plant varieties. Chemically all known gibberellins are gibberellic acids. (18 Nov 1997) |
| gibberellin 2beta, 3beta-hydroxylase | <enzyme> Bifunctional enzyme from pumpkin endosperm; catalyses all 3 beta hydroxylations of c19 and c20 gibberillins and all 2 beta hydroxylations of c20 gibberellins; genbank u63650 Registry number: EC 1.14.99.- Synonym: cm3h gene product, ga 2beta, 3beta-hydroxylase (26 Jun 1999) |
| gibberellin 3beta-hydroxylase | <enzyme> Product of le (stem length) gene of pea (pisum sativum) described by mendel; genbank u93210 Registry number: EC 1.14.99.- Synonym: ga4 gene product, le gene product, ga 3beta-hydroxylase (26 Jun 1999) |
| gibberellin 7-oxidase | <enzyme> A 2-oxoglutarate-dependent dioxygenase from pumpkin endosperm, involved in gibberellin biosynthesis; 314 amino acids, mw 35.7 kD; genbank u61386 Registry number: EC 1.14.11.- Synonym: ga 7-oxidase, ga-7-dioxygenase (26 Jun 1999) |
| gibberellins | A class of plant growth hormone isolated from cultures of gibberella fujikuroi, a fungus causing bakanae disease in rice. There are many different members of the family as well as mixtures of multiple members; all are diterpenoid acids based on the gibberellane skeleton. (12 Dec 1998) |
| gibbet | 1. A kind of gallows; an upright post with an arm projecting from the top, on which, formerly, malefactors were hanged in chains, and their bodies allowed to remain asa warning. 2. The projecting arm of a crane, from which the load is suspended; the jib. Origin: OE. Gibet, F. Gibet, in OF. Also club, fr. LL. Gibetum;; cf. OF. Gibe sort of sickle or hook, It. Giubbetto gibbet, and giubbetta, dim. Of giubba mane, also, an under waistcoat, doublet, Prov. It. Gibba (cf. Jupon); so that it perhaps originally signified a halter, a rope round the neck of malefactors; or it is, perhaps, derived fr. L. Gibbus hunched, humped, E. Gibbous; or cf. E. Jib a sail. Source: Websters Dictionary (01 Mar 1998) |
| gibbon | <zoology> Any arboreal ape of the genus Hylobates, of which many species and varieties inhabit the East Indies and Southern Asia. They are tailless and without cheek pouches, and have very long arms, adapted for climbing. The white-handed gibbon (Hylobates lar), the crowned (H. Pilatus), the wou-wou or singing gibbon (H. Agilis), the siamang, and the hoolock. Are the most common species. Origin: Cf. F. Gibbon. Source: Websters Dictionary (01 Mar 1998) |
| gibbous | <plant biology> A distended, rounded swelling on one side, as on a calyx or corolla tube or segment. (17 Dec 1997) |
| Gibbs | J. Willard, U.S. Mathematician and physicist, 1839-1903. See: Gibbs-Donnan equilibrium, Gibbs-Helmholtz equation, Helmholtz-Gibbs theory, Gibbs' theorem, Gibbs free energy, Gibbs energy of activation. (05 Mar 2000) |
| Gibbs energy of activation | The Gibbs energy that must be added to that already possessed by a molecule or molecules in order to initiate a reaction. (05 Mar 2000) |