Simple past tense and past participle of assay.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "assayed" in a sentence
"The silver coin assayed by Sir Isaac Newton, varied from 1 1/2 to 76 pennyweights alloy, in the pound troy of mixed metal."
"The British standard has 18 dwt.; the Spanish coins assayed by Sir Isaac Newton, have from 18 to 19 1/2 dwt.; the new French crown has in fact 19 1/2, though by edict it should have 20 dwt., that is 1/12."
"The silver coin assayed by Sir Isaac Newton, varied from 1 1-2 to 76 pennyweights alloy, in the pound troy of mixed metal."