Also found in: Thesaurus, Acronyms, Idioms, Encyclopedia, Wikipedia.


A city of northwest California on Humboldt Bay, an arm of the Pacific Ocean. Lumbering, fishing, and tourism are important to its economy.


Used to express triumph upon finding or discovering something.

[Greek heurēka, I have found (it) (supposedly exclaimed by Archimedes upon discovering how to measure the volume of an irregular solid and thereby determine the purity of a gold object), first person sing. perfect tense of heuriskein, to find.]


an exclamation of triumph on discovering or solving something
[C17: from Greek heurēka I have found (it), from heuriskein to find; traditionally the exclamation of Archimedes when he realized, during bathing, that the volume of an irregular solid could be calculated by measuring the water displaced when it was immersed]


(yʊˈri kə, yə-)

1. (used as an exclamation of triumph at a discovery.)
2. (cap.) I have found (it): the reputed exclamation of Archimedes when he discovered a test, based on the principle of buoyancy, for the purity of gold.
[1560–70; < Greek heúrēka, 1st person singular perf. indic. of heurískein to find, discover]


A word exclaimed when someone discovers something, from an ancient Greek word meaning I have found it.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.eureka - an alloy of copper and nickel with high electrical resistance and a low temperature coefficientEureka - an alloy of copper and nickel with high electrical resistance and a low temperature coefficient; used as resistance wire
copper-base alloy - any alloy whose principal component is copper
2.Eureka - a town in northwest California on an arm of the Pacific Ocean
Calif., California, Golden State, CA - a state in the western United States on the Pacific; the 3rd largest state; known for earthquakes


[jʊəˈriːkə] EXCL¡eureka!


[jʊˈriːkə] excleurêka


References in classic literature ?
A Faithful Record of Their Amazing Adventures in an Underground World; and How with the Aid of Their Friends Zeb Hugson, Eureka the Kitten, and Jim the Cab-Horse, They Finally Reached the Wonderful Land of Oz
You will also become acquainted with Jim the Cab-Horse, the Nine Tiny Piglets, and Eureka, the Kitten.
Old Anthony Rockwall, retired manufacturer and proprietor of Rockwall's Eureka Soap, looked out the library window of his Fifth Avenue mansion and grinned.
But here's a pointer that may be of service to you: make friends with Eureka and you'll be solid at the palace.
The police scouted the theory of suicide, murder was dismissed as absurd, and the blame was thrown upon the Eureka Smokeless Cartridge Company.
Even if you don't have any symptoms now, the dentists at Eureka Dental Group can find issues like cavities, plaque build-up, receding gums, and other problems before they begin to seriously affect your health.
25 October 2017 - Texas, US-based midstream energy company Eureka Midstream Holdings, LLC has a new ownership structure, the company said.
The annual Eureka Prizes, presented by the Australian Museum, showcase the very best of Australian science in the four areas of: scientific research and innovation; science leadership; science communication and journalism; and school science.
the parent company of NexTier Bank, has said that it has completed the merger of Eureka Financial Corp.
Josette Biyo, SEI director, led the unveiling of the Eureka bus at the DOST Compound in Bicutan, Taguig City.
Eureka Genomics is a developer of low- to mid-plex, high throughput genotyping assays that use common next-generation sequencing platforms for signal readout.
Eureka Springs attracts everyone from art lovers to ghost hunters, and the city is not lacking for attractions: the infamous Crescent Hotel, the Christ of the Ozarks, the Great Passion Play, the Eureka Springs & North Arkansas Railroad; Thorncrown Chapel; shops, restaurants and hotels clinging to the city's famed winding streets.