| 单词 | provitamin |
| 释义 | provitamin (once / 2954828 pages) n WORD FAMILY provitamin USAGE EXAMPLESAnd they aren't hard to pick out in a crowd, as the provitamin bestows a distinctive bright orange color. Scientific American(Jul 01, 2014) Take, for example, Golden Rice, a provitamin A–enriched rice developed through genetic engineering that comprises many of the properties advocated by Schumacher and Brand. Scientific American(Sep 06, 2013) Take the mascara, which contains healthy ingredients like rice bran wax and ProVitamin B5, but comes in a saucy purple faux snakeskin tube. Time(Sep 18, 2010) n vitamin precursor; a substance that is converted into a vitamin in animal tissues Hypo|Hyper carotene, carotin, provitamin A an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver beta-carotenean isomer of carotene that is found in dark green and dark yellow fruits and vegetables hydrocarbon an organic compound containing only carbon and hydrogen |
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