Main Entry: ex·per·i·men·tal

Pronunciation: \ik-ˌsper-ə-ˈmen-t^əl also -ˌspir-\

Function: adjective

Date: 15th century

1 : of, relating to, or based on experience or experiment
2 a : serving the ends of or used as a means of experimentation <an experimental school> b : relating to or having the characteristics of experiment : tentative <still in the experimental stage>

— ex·per·i·men·tal·ly \-t^əl-ē\ adverb