| erythrite | 1. <chemistry> A colourless crystalline substance, C4H6.(OH)4, of a sweet, cooling taste, extracted from certain lichens, and obtained by the decomposition of erythrin; called also erythrol, erythroglucin, erythromannite, pseudorcin, cobalt bloom, and under the name phycite obtained from the alga Protococcus vulgaris. It is a tetrabasic alcohol, corresponding to glycol and glycerin. Now usu. Called erythritol, HO.CH2.CHOH.CHOH.CH2.OH Has coronary vasodilator activity. 2. <chemical> A rose-red mineral, crystallized and earthy, a hydrous arseniate of cobalt, known also as cobalt bloom; called also erythrin or erythrine. Origin: Gr. Red. Source: Websters Dictionary (01 Mar 1998) |
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| erythritol | <chemical> A four-carbon sugar formed from erythrose by reduction of the carbonyl group and occurring in algae, lichens, grasses, and several fungi. It is about twice as sweet as sucrose. Chemical name: 1,2,3,4-Butanetetrol, (R*,S*)- (12 Dec 1998) |
| erythrityl tetranitrate | <chemical> A vasodilator with general properties similar to nitroglycerin. Pharmacological action: vasodilator agents. Chemical name: 1,2,3,4-Butanetetrol, tetranitrate, (R*,S*)- (12 Dec 1998) |
| erythro- | 1. Combining form denoting red or red blood cell; corresponds to L. Rub-. 2. Indicates the structure of erythrose in a larger sugar; used as such, it is italicised (e.g., 2-deoxy-d-erythro-pentose). Origin: G. Erythros, red (05 Mar 2000) |
| erythro-dihydrobiopterin triphosphate synthetase | <enzyme> Converts 2-amino-6(5'-triphosphoribosyl)-amino-5-or -6-formamido-6-hydroxypyrimidine into quinonoid-d-erythrodihydroneopterin triphosphate Registry number: EC 3.5.4.- Synonym: dhbp-tp-synthetase (26 Jun 1999) |
| erythroblast | <haematology> Rather noncommittal name for a nucleated cell of the bone marrow that gives rise to erythrocytes. See: normoblasts, BFU E, CFU E, primitive and definitive erythroblasts (18 Nov 1997) |
| erythroblastemia | The presence of nucleated red cells in the peripheral blood. Origin: erythroblast + G. Haima, blood (05 Mar 2000) |
| erythroblastic anaemia | Anaemia characterised by the presence of large numbers of nucleated red cells (normoblasts and erythroblasts) in the peripheral blood. Seen especially in newborns with haemolytic anaemia, such as that caused by Rh or ABO incompatibility. Synonym: erythroblastic anaemia. (05 Mar 2000) |
| erythroblastopenia | A primary deficiency of erythroblasts in bone marrow, seen in aplastic anaemia. Origin: erythroblast + G. Penia, poverty (05 Mar 2000) |
| erythroblastosis | The presence of erythroblasts in considerable number in the blood. Origin: erythroblast + -osis, condition (05 Mar 2000) |
| erythroblastosis foetalis | <haematology> A condition which develops in the foetus due to an incompatibility between the mother's blood type (RH factor) and the baby's. Maternal antibodies, which enter the foetal circulation during delivery attack the baby's red blood cells leading to haemolysis (rupture of the cells). Symptoms include an infant with an enlarged liver and spleen, swelling, jaundice and anaemia. (27 Sep 1997) |
| erythroblastosis virus, avian | A species of avian type c retroviruses (retroviruses type c, avian) causing progressive anaemia and weakness in domestic and wild fowl. (12 Dec 1998) |
| erythroblastosis, foetal | Haemolytic anaemia of the foetus or newborn infant, caused by the transplacental transmission of maternally formed antibody, usually secondary to an incompatibility between the blood group of the mother and that of her offspring. (12 Dec 1998) |
| erythroblastotic | Pertaining to erythroblastosis, especially erythroblastosis foetalis. (05 Mar 2000) |
| erythroblasts | Immature, nucleated erythrocytes occupying the stage of erythropoiesis that follows formation of erythroid progenitor cells and precedes formation of reticulocytes. Popularly called normoblasts. (12 Dec 1998) |