michelson-morley experiment a celebrated experiment conducted by Albert Michelson and Edward Morley; their failure to detect any influence of the earth's motion on the velocity of light was the starting point for Einstein's theory of relativity
control experiment an experiment designed to control for variables affecting the results of another experiment
control condition,
control a standard against which other conditions can be compared in a scientific experiment; "the control condition was inappropriate for the conclusions he wished to draw"
experimentation -
the testing of an idea; "it was an experiment in living"; "not all experimentation is done in laboratories"