| diacetylmonoxime | A 2-oxo-oxime that can reactivate phosphorylated acetylcholinesterase in vitro and in vivo; it penetrates the blood-brain barrier. (05 Mar 2000) |
|---|---|
| diacetylmorphine | <chemical> (5 alpha,6 alpha)-7,8-didehydro-4,5-epoxy-17-methylmorphinan-3,6-diol diacetate (ester). A narcotic analgesic that may be habit-forming. It is a controlled substance (opium derivative) listed in the u.s. Code of federal regulations, title 21 parts 329.1, 1308.11 (1987). Sale is forbidden in the united states by federal statute. (merck index, 11th ed) Pharmacological action: analgesics, opioid, narcotics. Chemical name: Morphinan-3,6-diol, 7,8-didehydro-4,5-epoxy-17-methyl- (5alpha,6alpha)-, diacetate (ester) (12 Dec 1998) |
| diacetyltannic acid | An astringent used for treatment of diarrhoea. Synonym: diacetyltannic acid, tannylacetate. (05 Mar 2000) |
| diachronic | The word diachronic is from the Greek dia-, through + chronos, time = through time. As opposed to synchronic, at one point in time. (12 Dec 1998) |
| diachronic study | A study done over the course of time. For example, a longitudinal study of children with Down syndrome (trisomy 21) might involve the study of 100 children with this condition from birth to 10 years of age. Also called a longitudinal study. The opposite of a synchronic (cross-sectional) study. (12 Dec 1998) |
| diachylum | <medicine> A plaster originally composed of the juices of several plants (whence its name), but now made of an oxide of lead and oil, and consisting essentially of glycerin mixed with lead salts of the fat acids. Origin: NL. Diachylum, fr. Gr. Very juicy; thoroughly + juice. Source: Websters Dictionary (01 Mar 1998) |
| diacid | <chemistry> Divalent; said of a base or radical as capable of saturating two acid monad radicals or a dibasic acid. Cf. Dibasic, and Biacid. Origin: Pref. Di- + acid. Source: Websters Dictionary (01 Mar 1998) |
| diaclasis | Diaclasia Synonym: osteoclasis. Origin: G. Diaklasis, a breaking up, fr. Dia, through, + klasis, a breaking (05 Mar 2000) |
| diacrinous | Excreting by simple passage through a gland cell. Origin: G. Dia-krino, to separate one from another (05 Mar 2000) |
| diacrisis | Synonym: diagnosis. Origin: G. Dia-, through, + krisis, a judgment (05 Mar 2000) |
| diacritic | Diacritical Distinguishing; diagnostic; allowing of distinction. Origin: G. Diakritikos, able to distinguish (05 Mar 2000) |
| diacritical | That separates or distinguishes; applied to points or marks used to distinguish letters of similar form, or different sounds of the same letter, as, a, <acr/, a, o, o, etc. "Diacritical points." "A glance at this typography will reveal great difficulties, which diacritical marks necessarily throw in the way of both printer and writer." (A. J. Ellis) Origin: Gr, fr. To separate, distinguish; through + to separate. See Critic. Source: Websters Dictionary (01 Mar 1998) |
| diactinic | <physics> Capable of transmitting the chemical or actinic rays of light; as, diactinic media. Origin: Pref. Di- + actinic. Source: Websters Dictionary (01 Mar 1998) |
| diacylglycerol | Glycerol substituted on the 1 and 2 hydroxyl groups with long chain fatty acyl residues. DAG is a normal intermediate in the biosynthesis of phosphatidyl phospholipids and is released from them by phospholipase C activity. DAG from phosphatidyl inositol polyphosphates is important in signal transduction. Elevated levels of DAG in membranes activate protein kinase C by stabilising its catalytically active complex with membrane bound phosphatidyl serine and calcium. (18 Nov 1997) |
| diacylglycerol cholinephosphotransferase | <enzyme> An enzyme that catalyses the synthesis of phosphatidylcholines from cdpcholine and 1,2-diacylglycerols. Chemical name: CDPcholine:1,2-diacylglycerol cholinephosphotransferase Registry number: EC 2.7.8.2 (12 Dec 1998) |