provitamin

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pro·vi·ta·min

 (prō-vī′tə-mĭn)
n.
A vitamin precursor that the body converts to its active form through normal metabolic processes. Carotene, for example, is a provitamin of vitamin A.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

provitamin

(prəʊˈvɪtəmɪn)
n
(Biochemistry) a substance, such as carotene, that is converted into a vitamin in animal tissues
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

pro•vi•ta•min

(proʊˈvaɪ tə mɪn; Brit. also proʊˈvɪt ə mɪn)

n.
a substance that an organism can transform into a vitamin, as carotene, which is converted to vitamin A in the liver.
[1925–30]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.provitamin - vitamin precursor; a substance that is converted into a vitamin in animal tissues
hydrocarbon - an organic compound containing only carbon and hydrogen
carotene, carotin, provitamin A - an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Vitamin A is produced from provitamins. Its precursors are some carotenoids and retinyl esters (palmitate, propionate, acetate) [2,3].
In January-June 2014, large industrial enterprises exceeded the rates compared to same period last year for the production of medicines that do not contain hormones or antibiotics - by 5.8%; medicines containing other antibiotics and for retail sale - by 32.5%; provitamins, vitamins and their derivatives - 2.4 times.