Meaning

noun an alloy of copper and nickel with high electrical resistance and a low temperature coefficient; used as resistance wire

noun a town in northwest California on an arm of the Pacific Ocean

originFrom Ancient Greek εὕρηκα (heúrēka, “I have found”), perfect active indicative first person singular of εὑρίσκω (heurískō, “to find”). Archimedes supposedly exclaimed this when he figured out how to determine the density of an object. First use appears c. 1603 in a text by Philemon Holland.

Etymology from Wiktionary, CC BY-SA 3.0