Eū-rē'kā, n.

n. [Gr. εὕρηκα, I have found, perfect indicative of εὑρίσκειν, to find.] A discovery; especially, a discovery made after long or difficult research;—so called in allusion to the story of Archimedes, who is said to have uttered this word, on finding out, after long and patient study, a method of detecting the adulteration of King Hiero's crown.