eureka

E1U1R1E1K5A1
UK/jəˈɹiː.kə/US/jʊˈɹiː.kə/

interjection

An exclamation indicating a sudden discovery.

“I rolled back the rug and eureka - there it was!”

Similar
constantan
OriginAncient Greek εὕρηκα →
CommonScrabble 10
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Meanings

eureka1

interjectioneureka!
  1. An exclamation indicating a sudden discovery.

    I rolled back the rug and eureka - there it was!

    3 more examples

    Eureka! I have found it! What I mean / To say is, not that love is idleness, / But that in love such idleness has been / An accessory, as I have cause to guess.

    1821, Byron, Don Juan

    "Eureka!" he cried, his teeth shining through his beard. "Gentlemen, you may congratulate me and we may congratulate each other. The problem is solved."

    1912, Arthur Conan Doyle, The Lost World […], London; New York, N.Y.: Hodder and Stoughton, →OCLC

    A page is turned - eureka, a snatch of tune / is playing itself, the piss-proud syllables / are unveiling a difficult prosody.

    1970, Peter Porter, The Sanitized Sonnets, The Last of England
nouneureka (uncountable)
  1. uncountableSynonym of constantan (“copper-nickel alloy”).

    Synonyms: constantan

Eureka2

proper noun
  1. A locality in the Byron council area, north-eastern New South Wales, Australia.
  2. A rural locality in the Bundaberg Region, Queensland, Australia.
  3. A small suburb of Ballarat, Victoria, Australia.
  4. A community in Pictou County, Nova Scotia, Canada.
  5. A small research base in Fosheim Peninsula, Ellesmere Island, Qikiqtaaluk Region, Nunavut, Canada.
  6. A settlement in Waikato district, Waikato region, New Zealand.
  7. A number of places in the United States:
    1. A city, the county seat of Humboldt County, in northern California.

      Before dawn this morning, five of us drove into Eureka.

      1998, Octavia E. Butler, Parable of the Talents, HEADLINE PUBLISHING GROUP (2019), page 90
    2. A ghost town in Nevada County, California.
    3. A mining ghost town in San Juan County, Colorado.
    4. A city, the county seat of Woodford County, Illinois.
    5. An unincorporated community in Lawrence County, Indiana, also known as Geiberson.
    6. An unincorporated community in Luce Township, Spencer County, Indiana.
    7. A city, the county seat of Greenwood County, Kansas.
    8. A city in St. Louis County, Missouri.
    9. An unincorporated community in Cinque Hommes Township, Perry County, Missouri.
    10. A town in Lincoln County, Montana.
    11. An unincorporated town and census-designated place, the county seat of Eureka County, Nevada.
    12. A town in Wayne County, North Carolina.
    13. An unincorporated community in Warrington Township, Bucks County and Montgomery Township, Montgomery County, Pennsylvania.
    14. An unincorporated community in Aiken County, South Carolina.
    15. A city in McPherson County, South Dakota.
    16. A ghost town in Crockett County, Texas.
    17. A ghost town in Franklin County, Texas.
    18. A tiny city in Navarro County, Texas.
    19. A small city in Juab County, Utah.
    20. An unincorporated community in Walla Walla County, Washington.
    21. An unincorporated community in Pleasants County, West Virginia.
    22. A town in Polk County, Wisconsin.
    23. An unincorporated census-designated place in the town of Rushford, Winnebago County, Wisconsin.
    24. A number of townships in the United States, listed under Eureka Township.
  8. A given name, like for the protagonists of Eureka's Castle or Eureka Seven.

Synonyms & antonyms

nounSynonym of constantan (“copper-nickel alloy”).

Similar
constantan

More synonyms by meaning

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

Similar
constantan
Broader
copper-base alloy
Also see
bazingaconstantani knowinspiration

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Ancient Greekεὕρηκα“I have found”
  2. Englisheureka

From 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.

More words from Ancient Greek

Full word history & related roots →

Translations

Arabic يُورِيكَا, لَقَدْ وَجَدتُهَا!
  • يُورِيكَا (yūrīkā)exclamation indicating sudden discovery
  • لَقَدْ وَجَدتُهَا! (laqad wajadtuhā!)exclamation indicating sudden discovery
Bulgarian е́врика
  • е́врика (évrika)exclamation indicating sudden discovery
Catalan eureka
  • eurekaexclamation indicating sudden discovery
Chinese Mandarin 尤里卡, 我發現了！ /我发现了！
  • 尤里卡 (yóulǐkǎ)exclamation indicating sudden discovery
  • 我發現了！ /我发现了！ (Wǒ fāxiàn le!)exclamation indicating sudden discovery
  • 我找到了！ (Wǒ zhǎo dào le!)exclamation indicating sudden discovery
Czech heuréka
  • heurékaexclamation indicating sudden discovery
Danish heureka
  • heurekaexclamation indicating sudden discovery
Finnish heureka
  • heurekaexclamation indicating sudden discovery
French eurêka
  • eurêkaexclamation indicating sudden discovery
German heureka
  • heurekaexclamation indicating sudden discovery
Greek εύρηκα
  • εύρηκα (évrika)exclamation indicating sudden discovery
Hungarian heuréka
  • heurékaexclamation indicating sudden discovery
Icelandic það tókst, þar kom það
  • það tókstexclamation indicating sudden discovery
  • þar kom þaðexclamation indicating sudden discovery
  • ég hef fundið þaðexclamation indicating sudden discovery
Italian eureka
  • eurekaexclamation indicating sudden discovery
Japanese 我発見せり, わかった
  • 我発見せり (ware hakken seri)exclamation indicating sudden discovery
  • わかった (wakatta)exclamation indicating sudden discovery
  • 見つけた (mitsuketa)exclamation indicating sudden discovery
  • ユーレカ (yūreka)exclamation indicating sudden discovery
  • エウレカ (eureka)exclamation indicating sudden discovery
Persian یافتم
  • یافتم (yâftam)exclamation indicating sudden discovery
Polish eureka, heureka
  • eurekaexclamation indicating sudden discovery
  • heurekaexclamation indicating sudden discovery
Portuguese heureca, eureca
  • heurecaexclamation indicating sudden discovery
  • eurecaexclamation indicating sudden discovery
Romanian evrica
  • evricaexclamation indicating sudden discovery
Russian э́врика
  • э́врика (évrika)exclamation indicating sudden discovery
Spanish eureka
  • eurekaexclamation indicating sudden discovery
Swedish heureka, eureka
  • heurekaexclamation indicating sudden discovery
  • eurekaexclamation indicating sudden discovery
Turkish evreka, buldum
  • evrekaexclamation indicating sudden discovery
  • buldumexclamation indicating sudden discovery
Ukrainian е́врика
  • е́врика (évryka)exclamation indicating sudden discovery
Vietnamese ơ-rê-ca
  • ơ-rê-caexclamation indicating sudden discovery

Rhymes & wordplay

Rhymes with eureka

paprikaFredericasikaCosta Ricafarspeakerfikakavikariq'aspermathecatariqa
All rhymes →
Cite this entry
APA

eureka. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/eureka

MLA

“eureka.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/eureka. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “eureka,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/eureka.

Source: eureka on Wiktionary, CC BY-SA 4.0.