experimental

Etymology

experiment + -al

adj

1. Pertaining to or founded on experiment.
   Chemistry is an experimental science.
2. (sciences) Serving to be experimented upon; used in an experiment.
   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 […]. 1997, Roy Porter, The Greatest Benefit to Mankind, Folio Society, published 2016, page 541
3. Serving as an experiment; serving to experiment.
   his experimental band
   an experimental engine
   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. 2012 March-April, Colin Allen, “Do I See What You See?”, in American Scientist, volume 100, number 2, archived from the original on 2012-04-26, page 168
4. Experiential, empirical.
   experimental knowledge

noun

1. The subject of an experiment.