ex·per·i·men·tal 
(ĭk-spĕr′ə-mĕntl)
(ĭk-spĕr′ə-mĕntl)adj.
1.
a. Relating to or based on experiment: experimental procedures; experimental results.
b. Given to experimenting.
2. Of the nature of an experiment; constituting or undergoing a test: an experimental drug.
3. Founded on experience; empirical.
ex·per′i·mental·ly adv.