Main Entry: ¹as·say

Pronunciation: \ˈas-ˌā, a-ˈsā\

Function: noun

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