1. assaying - Noun
2. assaying - Verb
of Assay
The act or process of testing, esp. of analyzing or examining metals and ores, to determine the proportion of pure metal.
Source: Webster's dictionaryFor example: contraction of smooth muscle preparation for assaying histamine or the study of blood pressure response in case of adrenaline. Source: Internet
The terms "chemia" and "alchemia" were used as synonyms in the early modern period, and the differences between alchemy, chemistry and small-scale assaying and metallurgy were not as neat as in the present day. Source: Internet