[proh-vahy-tuh-min; Brit. also proh-vit-uh-min] 
| a substance that an organism can transform into a vitamin, as carotene, which is converted to vitamin A in the liver. |
| 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. |
provitamin pro·vi·ta·min (prō-vī'tə-mĭn)
n.
A vitamin precursor that is converted to its active form through normal metabolic processes.
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