experimental

Chemistry is an experimental science.

Brown-Séquard, noting that Addison's disease involved the failure of the adrenal (or suprarenal) glands near the kidneys, removed them in experimental animals, and thus proved they were necessary for life […].

Numerous experimental tests and other observations have been offered in favor of animal mind reading, and although many scientists are skeptical, others assert that humans are not the only species capable of representing what others do and don’t perceive and know.

experimental knowledge