" assay "

[Verb]  | "as*say" | \ a-ˈsā \

1: to analyze (something, such as an ore) for one or more specific components

2: to judge the worth of : estimate

3: try, attempt

Origin: 14th century ;

 See: ;

[Noun]  | "as*say" | \ ˈa-ˌsā \

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

2: analysis (as of an ore or drug) to determine the presence, absence, or quantity of one or more components; also : a test used in this analysis

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

Origin: 14th century ;

 Middle English, from Anglo-French assai, essai{mat|essay:1|};

[Noun]  | "enzyme-linked immunosorbent assay" 

1: an in vitro method for quantifying an antigen or antibody concentration in which the test material is immobilized on a surface and exposed either to a complex of an enzyme linked to an antibody specific for the antigen or an enzyme linked to an antigen specific for the antibody followed by reaction of the enzyme with a substrate to yield a colored product corresponding to the concentration of the test material —called also ELISA

Origin: 1976 ;

[Pronoun]  | "who" | \ ˈhü \

1: what or which person or persons —used as an interrogative —used by speakers on all educational levels and by many reputable writers, though disapproved by some grammarians, as the object of a verb or a following preposition

2: the person or persons that : whoever

3: —used as a function word to introduce a relative clause—used especially in reference to persons but also in reference to groups or to animals or to inanimate objects especially with the implication that the reference is really to a person —used by speakers on all educational levels and by many reputable writers, though disapproved by some grammarians, as the object of a verb or a following preposition

Origin: before 12th century ;

 Middle English, from Old English hwā; akin to Old High German hwer, interrogative pronoun, who, Latin quis, Greek tis, Latin qui, relative pronoun, who;

[Noun]  | "assay" 

[Verb]  | "assay"