assay
noun/əˈseɪ/
/əˈseɪ/
[countable, uncountable] (specialist)- the testing of metals and chemicals for quality, often to see how pure they areWord OriginMiddle English (in the general sense ‘testing, or a test of, the merit of somebody or something’): from Old French assai (noun), assaier (verb), variant of essai ‘trial’, essayer ‘to try’ based on late Latin exagium ‘weighing’, from the base of exigere ‘ascertain, weigh’.
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