| aqua | Water; a word much used in pharmacy and the old chemistry, in various signification, determined by the word or words annexed. Aqua ammoniae, the aqueous solution of ammonia; liquid ammonia; often called aqua ammonia. Aqua marine, or Aqua marina . Same as Aquamarine. Aqua regia . [L, royal water. <chemistry> A very corrosive fuming yellow liquid consisting of nitric and hydrochloric acids. It has the power of dissolving gold, the "royal" metal. Aqua Tofana, a fluid containing arsenic, and used for secret poisoning, made by an Italian woman named Tofana, in the middle of the 17th century, who is said to have poisoned more than 600 persons. Aqua vitae [L, water of life. Cf. Eau de vie, Usquebaugh], a name given to brandy and some other ardent spirits. Origin: L. See Ewer. Source: Websters Dictionary (01 Mar 1998) |
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| aqua fortis | <chemistry> Nitric acid. Origin: L, strong water. Source: Websters Dictionary (01 Mar 1998) |
| aqua regia | An alternative term for nitrohydrochloric acid. Origin: L. Royal water, so called from its power to dissolve gold (05 Mar 2000) |
| aquabirnavirus | A genus of RNA viruses in the family birnaviridae infecting fish, mollusks, and crustaceans. It is transmitted both vertically and horizontally with no known vectors. The natural hosts are salmonids and the type species is infectious pancreatic necrosis virus. (12 Dec 1998) |
| aquacobalamin | Vitamin B12a (tautomeric with B12b);a cobalamin derivative in which the sixth coordinate bond of the cobaltic ion is attached to a water molecule. See: vitamin B12. Synonym: aquocobalamin. (05 Mar 2000) |
| aquacobalamin reductase | <enzyme> Found in bacteria and vertebrates; catalyses the reduction of 2 aquacob(iii)alamin to 2 cob(ii)alamin in the presence of NADH; see also aquacobalamin reductase (NADPH) (EC 1.6.99.11) Registry number: EC 1.6.99.8 Synonym: NADH-linked aquacobalamine reductase, cob(iii)alamin reductase, aquacobalamine reductase (NADH) (26 Jun 1999) |
| aquaculture | <ecology> The cultivation of aquatic plants and animals for food or other purposes, this term often refers specifically to freshwater cultivation, as opposed to marine cultivation (mariculture). (09 Oct 1997) |
| aquagenic pruritus | Intense itching produced by brief contact with water at any temperature without visible changes in the skin. (05 Mar 2000) |
| aqualfs | <ecology> Soils with an aquic or peraquic moisture regime and having clay accumulating in the B-horizon, wet alfisols. (09 Oct 1997) |
| aquamarine | <chemical> A transparent, pale green variety of beryl, used as a gem. See Beryl. Source: Websters Dictionary (01 Mar 1998) |
| aquaphobia | <psychology> Morbid fear of water. Origin: L. Aqua, water, + G. Phobos, fear (05 Mar 2000) |
| aquaporin | <protein> Plant cell wall polysaccharides containing predominantly arabinose and galactose. Two main types are recognised: arabinogalactan 1, found in the pectin portion of angiosperms and containing _(1-4) linked galactan and _ arabinose side chains, arabinogalactan II, a highly branched polymer containing _(1-3) and _ (1-6) linked galactose and peripheral _ arabinose residues. Arabinogalactan II is found in large amounts on some gymnosperms, especially larches and is related to AGP. (18 Nov 1997) |
| aquapuncture | <medicine> The introduction of water subcutaneously for the relief of pain. Origin: L. Aqua water, + punctura puncture, pungere, punctum, to, prick. Source: Websters Dictionary (01 Mar 1998) |
| aquarium | An artificial pond, or a globe or tank (usually with glass sides), in which living specimens of aquatic animals or plants are kept. Origin: L. See Aquarius, Ewer. Source: Websters Dictionary (01 Mar 1998) |
| aquarius | <astronomy> The Water-bearer; the eleventh sign in the zodiac, which the sun enters about the 20th of January; so called from the rains which prevail at that season in Italy and the East. A constellation south of Pegasus. Origin: L. Aquarius, adj, relating to water, and n, a water-carrier, fr. Aqua. See Aqua. Source: Websters Dictionary (01 Mar 1998) |