4. (noun)assay 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.
5. (verb)assay analyze (chemical substances)
6. (verb)try, seek, attempt, essay, assay make an effort or attempt "He tried to shake off his fears"; "The infant had essayed a few wobbly steps"; "The police attempted to stop the thief"; "He sought to improve himself"; "She always seeks to do good in the world"
Definition of 'assay'
