experimental

All the Virgin Galactic test flying was done under a special experimental permit issued by the Federal Aviation Administration.

Several Americans, we are informed, have gallantly offered themselves for experimental purposes.

Neither I nor my companion would have had the courage to have gone in her on her experimental trip.

The work of this department is experimental and investigative, with a view to the improvement of agriculture in all its branches.

He was the advocate of experimental rather than theoretical systems of medicine, and early adopted the practice of inoculation.

He appeared as cool and steady as if he were commanding on an experimental test instead of making his first rescue in the air.