| 单词 | provitamin |
| 释义 | provitamin[ proh-vahy-tuh-min; British also proh-vit-uh-min ] / proʊˈvaɪ tə mɪn; British also proʊˈvɪt ə mɪn / noun Biochemistry.a substance that an organism can transform into a vitamin, as carotene, which is converted to vitamin A in the liver. Origin of provitaminFirst recorded in 1925–30; pro-1 + vitamin Words nearby provitaminprovision, provisional, Provisional Wing of the Irish Republican Army, proviso, provisory, provitamin, provitamin A, provitamin D2, provo, provocateur, provocation Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for provitaminprovitamin / (prəʊˈvɪtəmɪn) / nouna substance, such as carotene, that is converted into a vitamin in animal tissues 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 provitaminprovitamin [ prō-vī′tə-mĭn ] n.A vitamin precursor that is converted to its active form through normal metabolic processes. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. |
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