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micronutrient

[mahy-kroh-noo-tree-uh nt, -nyoo-]
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noun Biochemistry.
  1. an essential nutrient, as a trace mineral or vitamin, that is required by an organism in minute amounts.

Origin of micronutrient

First recorded in 1935–40; micro- + nutrient
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for micronutrient

micronutrient

noun
  1. any substance, such as a vitamin or trace element, essential for healthy growth and development but required only in minute amounts
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

micronutrient in Medicine

micronutrient

(mī′krō-nōōtrē-ənt)
n.
  1. A substance, such as a vitamin or mineral, that is essential in minute amounts for the proper growth and metabolism of a living organism.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.