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trace element

trace el·e·ment (plural trace el·e·men·ts)


noun 
Definition:
 
1. element present in tiny amount: a chemical element present in minute, but detectable amounts in something such as a metal or ore

2. element essential for health: an element that is required in minute amounts for normal growth and development and the functioning of vital enzyme systems, e.g. zinc, iodine, or manganese

3. minuscule amount: a very tiny amount
only a trace element of truth to that statement

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