Iapetus

I1A1P3E1T1U1S1
/aɪˈæpɪtəs/

proper noun

A Titan, the son of Uranus and Gaia, and father of Atlas, Prometheus, Epimetheus, and Menoetius.

Similar
Proto-AtlanticProto-Atlantic Ocean
OriginLatin Iapetus ← Ancient Greek Ἰαπετός ← Pre-Greek →
UncommonScrabble 9
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Meanings

proper noun

alternative Japetus

  1. Greekhuman sciencesA Titan, the son of Uranus and Gaia, and father of Atlas, Prometheus, Epimetheus, and Menoetius.
  2. astronomyA moon in Saturnian system, Solar System: The third largest moon of Saturn

    We were unable to see enough on Saturn's moon Iapetus to really understand why that moon has one bright hemisphere and one dark.

    1990 August, Bradford A. Smith, “Voyage of the Century”, in National Geographic, volume 178, number 2, page 55
  3. geographyA former ocean between former continent of Laurentia (North America) and former continent of Baltica (Europe): An ancient ocean which existed between 600 and 400 million years ago.

    So, in the early Ordovician, Iapetus was wide enough to have one side in high latitudes and the other in the tropics: a massive ocean, indeed.

    2004, Richard Fortey, The Earth, Folio Society, published 2011, page 184

    Synonyms: Proto-Atlantic, Proto-Atlantic Ocean

  4. alternativeobsoletebiblicalAlternative form of Japheth.

Synonyms & antonyms

proper nounA former ocean between former continent of Laurentia (North America) and former continent of Baltica (Europe): An ancient ocean which existed between 600 and 400 million years ago.

Similar
Proto-AtlanticProto-Atlantic Ocean

Origin

  1. Pre-Greek
  2. Ancient GreekἸαπετός
  3. LatinIapetus
  4. EnglishIapetus

From Latin Iapetus, from Ancient Greek Ἰαπετός (Iapetós), possibly from Pre-Greek. * (moon): Named after the titan. * (ocean): The Iapetus Ocean was the predecessor to the Atlantic Ocean, so this name was chosen because Iapetus is the father of Atlas (see Atlantic).

More words from Latin, Ancient Greek, Pre-Greek

Full word history & related roots →

Translations

Ancient Greek Ἰαπετός
  • Ἰαπετός (Iapetós)the Titan
Catalan Jàpet
  • Jàpetthe moon of Saturn
Chinese Mandarin 土衛八 /土卫八
  • 土衛八 /土卫八 (Tǔwèibā)the moon of Saturn
Danish Iapetus
  • Iapetusthe Titan
Estonian Iapetos
  • Iapetosthe Titan
Finnish Iapetos, Japetus
  • Iapetosthe Titan
  • Japetusthe moon of Saturn
French Japet, Japet
  • Japetthe Titan
  • Japetthe moon of Saturn
German Japetus, Japetos
  • Japetusthe Titan
  • Japetosthe Titan
  • Iapetosthe Titan
  • Japetusthe moon of Saturn
  • Iapetusthe moon of Saturn
Greek Ιαπετός, Ιαπετός
  • Ιαπετός (Iapetós)the Titan
  • Ιαπετός (Iapetós)the moon of Saturn
Italian Giapeto
  • Giapetothe moon of Saturn
Japanese イーアペトス, イアペトゥス
  • イーアペトス (Īapetosu)the Titan
  • イアペトゥス (Iapetusu)the moon of Saturn
Korean 이아페토스, 이아페투스
  • 이아페토스 (Iapetoseu)the Titan
  • 이아페투스 (Iapetuseu)the moon of Saturn
Latin Japetus
  • Japetusthe Titan
Polish Japet, Japet
  • Japetthe Titan
  • Japetthe moon of Saturn
  • Japetthe ancient ocean
Portuguese Jápeto, Iápeto
  • Jápetothe Titan
  • Iápetothe Titan
  • Jápetothe moon of Saturn
Russian Я́пет, Я́пет
  • Я́пет (Jápet)the Titan
  • Я́пет (Jápet)the moon of Saturn
Spanish Jápeto, Jápeto
  • Jápetothe Titan
  • Jápetothe moon of Saturn
Cite this entry
APA

Iapetus. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/Iapetus

MLA

“Iapetus.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Iapetus. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “Iapetus,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/Iapetus.

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