assay

¹as·say

noun \ˈas-ˌā, a-ˈsā\

Definition of ASSAY

1

: examination and determination as to characteristics (as weight, measure, or quality)

2

: analysis (as of a drug) to determine the presence, absence, or quantity of one or more components—compare bioassay

3

: a substance to be assayed; also : the tabulated result of assaying