eureka

 
Pronunciation: /ˌjʊ(ə)ˈriːkə/

exclamation

  • a cry of joy or satisfaction when one finds or discovers something: The answer hit me. ‘Eureka!’ I cried [as noun]: there weren’t many eurekas but science is moving steadily [as modifier]: the eureka moment for him came when he was hill-walking

noun

[mass noun] trademark
  • an alloy of copper and nickel used for electrical filaments and resistance wire.

Origin:

early 17th century: from Greek heurēka 'I have found it' (from heuriskein 'find'), said to have been uttered by Archimedes when he hit upon a method of determining the purity of gold. The noun dates from the early 20th century