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单词 micronutrient
释义 mi·cro·nutrient
I. \“+\ noun
Etymology: micr- + nutrient
1. : trace element
2. : an organic compound (as a vitamin) essential in minute amounts only to the growth and welfare of an animal — compare macronutrient
II. adjective
: of, relating to, or being a micronutrient
 < micronutrient deficiency >
: required for nutrition only in minute amounts
 < micronutrient elements such as manganese and zinc — Science >
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