experimental
adjective uk/ɪkˌsper.ɪˈmen.təl/ us/ɪkˌsper.əˈmen.t̬əl/
C2 （尤指科学方面）实验（性）的，试验（性）的，根据实验（试验）的
relating to tests, especially scientific ones
The drug is still at the experimental stage (= is still being tested). 这种药物仍处于试验阶段。
The changes to the distribution system are purely experimental at the moment. 目前分配体系的变革纯粹是试验性的。
experimental psychology 实验心理学