| 单词 | vitamin b12 |
| 释义 | vitamin B12 in British Englishnoun another name for cyanocobalamin cyanocobalamin in British English (ˌsaɪənəʊkəʊˈbæləmɪn) or cyanocobalamine (ˌsaɪənəʊkəʊˈbæləmiːn) noun a complex red crystalline compound, containing cyanide and cobalt and occurring in liver: lack of it in the tissues leads to pernicious anaemia. Formula: C63H88O14N14PCo Also: vitamin B12 Word origin C20: from cyano- + cobal(t) + (vit)aminvitamin B12 in American Englishnoun a deep-red crystalline, water-soluble solid, C63H88N14O14PCo, obtained from liver, milk, eggs, fish, oysters, and clams: a deficiency causes pernicious anemia and disorders of the nervous system Also called: cyanocobalamin, cobalamin, extrinsic factor Word origin [1945–50]This word is first recorded in the period 1945–50. Other words that entered Englishat around the same time include: beeper, individual medley, poison pill, regression analysis, spin-off |
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