From Longman Dictionary of Contemporary Englishassayas‧say /əˈseɪ/ verb [transitive] TIto test a substance, especially a metal, to see how pure it is or what it is made of —assay /əˈseɪ, ˈæseɪ $ ˈæseɪ, æˈseɪ/ noun [countable]→ See Verb table
Examples from the Corpus
assay• Opera, assayed Alidoro with typical unsparing elegance.• Carolyn Felix assayed and interpreted p53 status.• But each is labeled and cataloged, chipped, cut, powdered, assayed, and probed.• We have our own Ministry registered salmonella testing laboratory with around 8000 raw materials and animal rations assayed annually.• Distribution of gluRs on the surface of muscle 6 was assayed as previously.• But I find that at some point along the way my ability to assay ceases.• Also shown are the regions of the c-Jun protein which were expressed in E.coli and assayed in this report.From Longman Business Dictionaryassayas‧say1 /əˈseɪ, ˈæseɪ/ noun [countable, uncountable] a test to show how pure a metal, drug etc isThe experiments were done under standard assay conditions.assayas‧say2 /əˈseɪ/ verb [transitive] to test something such as a metal or drug to find out how pure it isAll samples were assayed in duplicate.→ See Verb tableOrigin assay (1300-1400) Old French assaier, essaier, from Late Latin exagium; → ESSAY1 