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Definitions from the Web

Verb: Assay

Definition:

1. Determine the quality or composition of a substance through testing or analysis.
2. Attempt or try something, usually with the aim of achieving a goal.

Sense 1:

Usage as "determine the quality or composition of a substance":

Scientists assay the sample to discover its chemical composition.

Related products on Amazon: Chemical Analysis Books

Sense 2:

Usage as "attempt or try something":

The young musician aspired to assay a difficult piece during the concert.

Related products on Amazon: Music Performance Books