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

A filmed audition to test the screen-acting ability of a potential actor. / (slang) Synonym of rough ride

To perform any of the above tests.

A test for leaks involving blowing smoke into a tube or pipe.

(idiomatic) An informal check of an idea or proposal, using one's common sense or sense of propriety.

A fluoroscopic medical test during which the examinee is asked to "sniff" (quickly breathe in through the nose); diaphragm fluoroscopy.

A measurement performed on motor vehicles, required by the DMV, to prevent issuing valid registration if an excessive amount of waste fumes are produced during typical use. Cars typically are placed on a dynamometer to simulate different driving speeds.

(engineering) Either a static or dynamic test of the relative density of sand, silt, etc. using a penetrometer.

A test in which a potential consumer is asked to determine blindly which of three similar items is not identical to the other two.

(medicine) A medical test in which a sample of saliva is analyzed, often in order to measure a person's hormone levels; such a test administered to an athlete in order to conclusively determine gender.