| 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) |
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| 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) |
| diacylglycerol kinase | <enzyme> An enzyme of the transferase class that catalyses the phosphorylation of a diacylglycerol to form a phosphatidate, using ATP as a phosphate donor. Chemical name: ATP:1,2-diacylglycerol 3-phosphotransferase Registry number: EC 2.7.1.107 (12 Dec 1998) |
| diacylglycerol lipase | <enzyme> An enzyme of the hydrolase class that catalyses the reaction of triacylglycerol and water to yield diacylglycerol and a fatty acid anion. The enzyme hydrolyzes triacylglycerols in chylomicrons, very-low-density lipoproteins, low-density lipoproteins, and diacylglycerols. It occurs on capillary endothelial surfaces, especially in mammary, muscle, and adipose tissue. Genetic deficiency of the enzyme causes familial hyperlipoproteinaemia type I. Chemical name: Triacylglycero-protein acylhydrolase Registry number: EC 3.1.1.34 (12 Dec 1998) |
| diacylglycerol pyrophosphate phosphatase | <enzyme> Catalyses the dephosphorylation of the beta phosphate of diacylglycerol pyrophosphate (dgpp) to produce phosphatidate and p(i) Registry number: EC 3.6.1.- Synonym: dgpp phosphatase (26 Jun 1999) |
| diacytosis | Discharge of an empty pinocytotic vesicle from a cell. Not commonly used. (18 Nov 1997) |
| diad | 1. The transverse tubule and a cisterna in cardiac muscle fibres. Synonym: dyad. (05 Mar 2000) |
| diadelphia | <botany> A Linnaean class of plants whose stamens are united into two bodies or bundles by their filaments. Source: Websters Dictionary (01 Mar 1998) |