Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Old French
Origin: assaier, essaier, from Late Latin exagium; ESSAY1

assay

 verb
     
Related topics: Industry
as‧say [transitive]
TI to test a substance, especially a metal, to see how pure it is or what it is made of
—assay noun [countable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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