| ambageusia | Loss of taste from both sides of the tongue. Origin: L. Ambo, both, + G. A-priv. + geusis, taste (05 Mar 2000) |
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| ambal | <radiobiology> An ambipolar trap (tandem mirror) located at Novosibirsk in Russia. (Any additional information would be welcome.) (09 Oct 1997) |
| Ambard's constant | <physiology> Obsolete law's for output of urea: 1. With the urinary urea concentration constant, urea output varies directly as the square of the concentration of the blood urea. 2. With the blood urea concentration constant, urea output varies inversely as the square root of its urinary concentration. (05 Mar 2000) |
| Ambard's laws | <physiology> Obsolete law's for output of urea: 1. With the urinary urea concentration constant, urea output varies directly as the square of the concentration of the blood urea. 2. With the blood urea concentration constant, urea output varies inversely as the square root of its urinary concentration. (05 Mar 2000) |
| Ambard, Leon | <person> French pharmacologist, 1876-1962. See: Ambard's constant, Ambard's laws. (05 Mar 2000) |
| ambenonium chloride | <chemical> A quaternary ammonium compound that is an inhibitor of cholinesterase activity with actions similar to those of neostigmine, but of longer duration. Ambenonium is given by mouth in the treatment of myasthenia gravis. Pharmacological action: cholinesterase inhibitor, parasympathomimetic. Chemical name: Benzenemethanaminium, N,N'-((1,2-dioxo-1,2-ethanediyl)bis(imino-2,1-ethanediyl))bis(2-chloro-N,N-diethyl-, dichloride (12 Dec 1998) |
| amber | 1. <chemical> A yellowish translucent resin resembling copal, found as a fossil in alluvial soils, with beds of lignite, or on the seashore in many places. It takes a fine polish, and is used for pipe mouthpieces, beads, etc, and as a basis for a fine varnish. By friction, it becomes strongly electric. 2. Amber colour, or anything amber-coloured; a clear light yellow; as, the amber of the sky. 3. Ambergris. "You that smell of amber at my charge." (Beau. & Fl) 4. The balsam, liquidambar. Black amber, and old and popular name for jet. Origin: OE. Aumbre, F. Ambre, Sp. Ambar, and with the Ar. Article, alambar, fr. Ar. 'anbar ambergris. Source: Websters Dictionary (01 Mar 1998) |
| amber codon | <molecular biology> One of the three terminator codons. Its sequence is UAG. See: ochre codon, opal codon. (18 Nov 1997) |
| amber fish | <zoology> A fish of the southern Atlantic coast (Seriola Carolinensis) Source: Websters Dictionary (01 Mar 1998) |
| amber mutant | A mutant with a mutation resulting in a UAG codon. (05 Mar 2000) |
| amber mutation | <molecular biology> A mutation from a codon which codes for an amino acid into the amber codon UAG, which normally signals that the translation of mRNA into an amino acid chain should stop. The mutation causes the amino acid chain to stop forming before it is actually completed. (09 Oct 1997) |
| amber seed | Seed of the Hibiscus abelmoschus, somewhat resembling millet, brought from Egypt and the West Indies, and having a flavor like that of musk; musk seed. Source: Websters Dictionary (01 Mar 1998) |
| amber suppressor | <molecular biology> A tRNA molecule which suppresses amber mutations because it has mutated to recognise the amber codon UAG (which normally signals that the translation of mRNA into an amino acid chain should stop) as a signal for inserting whatever amino acid it carries into the chain. As a result, it can prevent the amino acid chain from ending before it is completed. (09 Oct 1997) |
| amber tree | A species of Anthospermum, a shrub with evergreen leaves, which, when bruised, emit a fragrant odour. Source: Websters Dictionary (01 Mar 1998) |
| Amberg's lateral sinus line | A line dividing the angle formed by the anterior edge of the mastoid process and the temporal line. (05 Mar 2000) |