provitamin a

English Thesaurus

1. an orange isomer of an unsaturated hydrocarbon found in many plants; is converted into vitamin A in the liver (noun.substance)

hypernym	:	provitamin,
definition	:	vitamin precursor; a substance that is converted into a vitamin in animal tissues (noun.substance)

hyponym	:	beta-carotene,
definition	:	an isomer of carotene that is found in dark green and dark yellow fruits and vegetables (noun.substance)