| hydrate | <chemistry> A compound formed by the union of water with some other substance, generally forming a neutral body, as certain crystallized salts. A substance which does not contain water as such, but has its constituents (hydrogen, oxygen, hydroxyl) so arranged that water may be eliminated; hence, a derivative of, or compound with, hydroxyl; hydroxide; as, ethyl hydrate, or common alcohol; calcium hydrate, or slaked lime. Origin: Gr. "ydwr water: cf. F. Hydrate. Source: Websters Dictionary (01 Mar 1998) |
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| hydrate crystal | One of several possible microstructural arrangements of water molecules based on intermolecular forces; suggested as being involved in the mode of action of inhalation anaesthetics. (05 Mar 2000) |
| hydrate microcrystal theory of anaesthesia | A theory of narcosis pertaining to nonhydrogen-bonding agents; postulates the interaction of the molecules of the anaesthetic drug with water molecules in the brain. Synonym: Pauling's theory. (05 Mar 2000) |
| triketohydrindene hydrate | Former name for ninhydrin. (05 Mar 2000) |
| folliculin hydrate | <chemical> (16 alpha,17 beta)-estra-1,3,5(10)-triene-3,16,17-triol. A metabolite of estradiol and usually the predominant oestrogenic metabolite in urine. During pregnancy, large amounts of estriol are produced by the placenta. It has also been obtained from plant sources. The 16 beta-isomer has also been isolated from the urine of pregnant women. Chemical name: Estra-1,3,5(10)-triene-3,16,17-triol, (16alpha,17beta)- (12 Dec 1998) |