n. & v.
--n.
1. a procedure adopted on the chance of its succeeding, for testing a hypothesis etc., or to demonstrate a known fact.
2 (foll. by of) a test or trial of.
--v.intr. (often foll. by on, with) make an experiment.
Derivatives:
experimentation n. experimenter n.
Etymology: ME f. OF experiment or L experimentum (as EXPERIENCE)