A rigorous test or appraisal of the quality or worth of something.
In the 1960s, a party based around the use and advocacy of the psychedelic drug LSD ("acid").
Tested purity or value.
Trial, attempt.
The qualitative or quantitative chemical analysis of something.
The act or process of ascertaining the proportion of a particular metal in an ore or alloy; especially, the determination of the proportion of gold or silver in bullion or coin.
The alloy or metal to be assayed.
Examination and determination; test.
Trial by danger or by affliction; adventure; risk; hardship; state of being tried.
To affect.
To analyze or estimate the composition or value of (a metal, ore etc.).
To attempt (something).
To try tasting, as food or drink.