experiment (up)on (someone or something)
To perform tests on something in order to gain insight and data about it. We got approval to start experimenting on mice, so we can see how the procedure affects their islet cells.
See also: experiment
experiment (up)on someone or something
to use someone or something as the subject of an experiment. (Upon is formal and less commonly used than on.) Do you think we should experiment upon people? The researchers were experimenting on a new drug that might cure rabies.