trace-element

trace element

noun Biochemistry.
any element that is required in minute quantities for physiological functioning.
Also called trace mineral.


Origin:
1935–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Trace-element is always a great word to know.
So is callithumpian. Does it mean:
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
American Heritage
Medical Dictionary

trace element n.

  1. A chemical element required in minute quantities by an organism to maintain proper physical functioning.

  2. A minute quantity or amount, as of a chemical compound.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
trace element   (trās)  Pronunciation Key 
An element present in an organism in only very small amounts but essential for normal metabolism. Iodine and cobalt are trace elements required by humans.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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