Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
A substance, such as a vitamin or mineral, that is essential in minute amounts for the proper growth and metabolism of a living organism.
(Biology) any substance, such as a vitamin or trace element, essential for healthy growth and development but required only in minute amounts
mi•cro•nu•tri•ent(ˌmaɪ kroʊˈnu tri ənt, -ˈnyu-)
an essential nutrient, as a trace mineral, that is required in minute amounts.
micronutrient- One of the vitamins and minerals needed only in small amounts for normal body function.
See also related terms for minerals.