A cry of joy or satisfaction when one finds or discovers something. Recorded from the early 17th century, and said to have been uttered by Archimedes when he hit upon a method of determining the purity of gold (Greek heurēka ‘I have found it’).
Eureka was the name given to a lode in the Ballarat goldfield.
Eureka flag a blue flag bearing a white cross with a star at the end of each arm, first raised at the Eureka stockade; it is also known as the Southern Cross.
Eureka stockade scene of a clash between gold-miners and the police and military at the site of the Eureka lode at Ballarat in 1854, now a symbol of republicanism.