| 单词 | vitamin b12 |
| 释义 | vitamin B12nouna 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. Origin of vitamin B12First recorded in 1945–50 Words nearby vitamin B12vitamin A2, vitamin A acid, vitamin A aldehyde, vitamin B, vitamin B1, vitamin B12, vitamin B12 neuropathy, vitamin B2, vitamin B3, vitamin B6, vitamin B9 Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for vitamin B12vitamin B12 nounanother name for cyanocobalamin Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for vitamin B12vitamin B12 n.A complex compound containing cobalt, found especially in liver and widely used to treat pernicious anemia.antipernicious anemia factor cobalamin cyanocobalamin extrinsic factor The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for vitamin B12vitamin B12 A water-soluble, complex organic compound containing cobalt, found especially in meat, liver, eggs, milk, and milk products. Vitamin B12 is necessary for the synthesis of DNA by the body, for the production of blood cells, and for maintaining the health of nerves. A deficiency of vitamin B12 in the diet results in pernicious anemia. Also called cobalamin cyanocobalamin The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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