a.

1. 实验性的；试验性的
   This is an experimental form of teaching.

   这是一种实验性的教学形式。

2. 根据实验的；实验用的
   There is no experimental evidence for the theory.

   这一理论还没有实践依据。

adj.

1. based on untested ideas or techniques and not yet established or finalized.
   ▸relating to scientific experiments.
2. (of art) radically new and innovative.
3. archaic based on experience as opposed to authority or conjecture.