Origin: Latin suffix -ment
Control experiment has 2 different meanings across 1 category:
an experiment designed to control for variables affecting the results of another experiment
A parallel experiment designed to replicate the main experiment in every way, except in respect of the one variable that is being tested, so as isolate the effect of that variable; for example, an experiment in which subjects are given a placebo instead of an active drug, intended to check that any observed benefits of the drug derive from the drug itself and not from other factors involved in its administration.