| provitamin | (n) vitamin precursor; a substance that is converted into a vitamin in animal tissues |
| provitamin a | (n) an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver, Syn. carotin, carotene |
| プロビタミン | [purobitamin] (n) provitamin [Add to Longdo] |