Rhyme Desk
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Definition of "Assay" :

noun: a quantitative or qualitative test of a substance (especially an ore or a drug) to determine its components; frequently used to test for the presence or concentration of infectious agents or antibodies etc.

noun: an appraisal of the state of affairs

"They made an assay of the contents."

noun: a written report of the results of an analysis of the composition of some substance

noun: a substance that is undergoing an analysis of its components

verb: analyze (chemical substances)

verb: make an effort or attempt