Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A chemical element present in tiny amounts.
- noun A chemical element required in minute quantities by an organism to maintain proper physical functioning.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun chemistry A
chemical element present in a sample in very small quantities. - noun biochemistry A chemical element in an organism’s
diet that isrequired in very small amounts in order to maintain properbiochemical function ; amicronutrient .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an element that occurs at very small quantities in the body but is nonetheless important for many biological processes
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