(statistics) Ellipsis of Student's t-test.

(advertising) A method of market research that predicts in-market performance of an advertisement before it airs.

Any test done as practice, before an official test.

(idiomatic) To explore or probe, as before making a commitment.

fluorine dating

A sample driving session in a motor vehicle, in order to assess its quality before purchase. / (figuratively) Any preliminary assessment of something through use.

To take a motor vehicle on the road to assess its quality before purchase. / (figuratively) To make a preliminary assessment of something through its use.

(chemistry) A simple test for the acidity or alkalinity of a substance, using litmus paper.

any of several tests to measure a specific reaction between antigen and antibody which results in a visible precipitate

Any chemical check for the presence of (usually illegal) drugs in a sample of one's blood, hair or urine.