1. Test of purity; trial.

2. To examine; to subject to analysis.

3. The quantitative or qualitative evaluation of a substance for impurities, toxicity, etc; the results of such an evaluation.


[M.E., fr. O.Fr. essaier, fr. L>L> exagium, a weighing]

Ames assay

biological assay

clonogenic assay

competitive binding assay

complement binding assay

double antibody sandwich assay

EAC rosette assay

enzyme-linked immunosorbent assay

Grunstein-Hogness assay

hemizona assay

immunochemical assay

immunoradiometric assay

indirect assay

Lowry-Folin assay

Lowry protein assay

radioreceptor assay

Raji cell radioimmune assay