(figuratively) A rigorous test or appraisal of the quality or worth of something. / (historical) In the 1960s, a party based around the use and advocacy of the psychedelic drug LSD ("acid").

A laboratory bench upon which a device is physically tested. / A virtual simulation of a device for the same purpose.

a paper submitted by a student for academic examination / (chemistry) a small piece of paper impregnated with a chemical indicator for making qualitative tests

(law) A legal action intended to set a precedent. / (computing) Any of a set of conditions and variables used to test an application.

(chemistry) a glass tube, rounded at one end and open at the other; used for small-scale laboratory tests

produced in a test tube / conceived or developed in vitro by artificial insemination

A serologic analysis of a sample of blood; a test in which blood is removed from a subject and analyzed to determine the presence or levels of any of a variety of substances which indicate whether the subject has health problems.

a test used to establish which cerebral functions are localised to which hemisphere

(chemistry) in qualitative inorganic analysis, a simple test for the presence of a range of metallic elements based on the colour imparted to a flame by a sample

(software, testing) A process where a software application approaching full functionality is made available to a group of sophisticated users.