Anatomists and other scientists in several countries have tried to perform more definitive experiments on severed human heads as recently as 1956.

The shadow square was blacker than black, of the expensively achieved, definitive black used in high school black-body experiments.

Joseph made his first definitive experiments in November 1782 while living in the city of Avignon.

I've got a chance lere to do the definitive experiments.

The definitive experiments began on New Year's Eve 1988.

Physicians, like scientists, set great store by the definitive experiment - the crucial investigation that will show the direction for the future.

Finally, the critics say, the prion proponents have failed in their attempts to do the definitive experiment.

But if there was a definitive experiment, she would do it.

Economists theorize from their observations but find it almost impossible to conduct definitive experiments, particularly in the realm of macroeconomics.

Only the definitive experiment which remains beyond the scope of the National Science Foundation budget can say.