neptune

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Neptune¹

  • /ˈnɛptjuːn/ UK
  • /ˈnɛpt͡ʃuːn/ UK
  • /ˈnɛpˌt(j)un/ US
  • /ˈnept͡ʃʉːn/ New Zealand

Sounds like neptune

Where it comes from

The proper noun is derived from Middle English Neptune, Neptunus (“Roman god”), from Old English Neptune (“Roman god”), borrowed from Latin Neptūnus (“Roman god”), probably from Proto-Italic *neptūnos. The further etymology is uncertain; the following derivations have been suggested:

* From Proto-Indo-European *neptu- (“moist substance”), possibly related to Proto-Indo-European *nébʰos (“cloud; mist, moisture”), from *nebʰ- (“to become cloudy; to become damp”).

* From Proto-Indo-European *népōts (“descendant; grandson; (possibly) nephew”), in the sense of a descendant of water.

* From Latin Nepe, Nepet, Nepete (now the town of Nepi in Viterbo, Italy), known for its mineral springs and in a district where a cult of Neptune (and his Etruscan counterpart 𐌍𐌄𐌈𐌖𐌍𐌔 (neθuns, “Nethuns”)) existed, from Etruscan 𐌍𐌄𐌐𐌄𐌕𐌄 (nepete), possibly from a pre-Indo-European word meaning “damp, wide valley; plain” and related to Ancient Greek νᾰ́πη (nắpē, “dell, glen, woodland vale; chasm”).

Proper noun sense 2.2 (“eighth and furthest-known planet in the Solar System”) is a semantic loan from French Neptune, coined by the French astronomer and mathematician Urbain Le Verrier (1811–1877), who predicted the existence and position of the planet through mathematical calculations.

The noun is derived from the proper noun.

cognates

* Ancient Greek νέφος (néphos)

* Sanskrit नभस् (nabhas)

proper noun

  1. Roman The Roman god of earthquakes and the ocean, the counterpart of Poseidon in Greek mythology. But to returne to Theſeus, […] Pitheus alſo had geuen it out abroade, that he vvas begotten of Neptune, becauſe the Troezenians haue this god in great veneration, and doe vvorſhippe him as patron and protector of their cittie, making offerings to him of their firſt fruites: and they haue for the mar

    Similar: Neptunus

  2. broadly A personification of the ocean.
  3. broadly The eighth and furthest planet in the Solar System in terms of average distance from the Sun; an ice giant, by size it is the fourth largest planet. At a meeting of the French Academy of Science, M. Leverrier [Urbain Le Verrier] presented a fifth and final memoir on the new planet, which M. [François] Arago proposes to be called Neptune.

    Similar: mul:♆, mul:⯉

  4. broadly A township in Monmouth County, New Jersey.
  5. broadly An unincorporated community in Center Township, Mercer County, Ohio.
  6. broadly An unincorporated community in Jackson County, West Virginia.
  7. broadly An unincorporated community in the town of Ithaca, Richland County, Wisconsin.

noun Neptunes

  1. historical A sailor acting as Neptune (proper noun sense 1), the Roman god of the ocean, during a ceremony on board a ship when it is crossing the equator.

neptune²

  • /ˈnɛptjuːn/ UK
  • /ˈnɛpt͡ʃuːn/ UK
  • /ˈnɛpˌt(j)un/ US
  • /ˈnept͡ʃʉːn/ New Zealand

Sounds like Neptune

noun neptunes

  1. historical A brass or copper pan used to evaporate salt water to obtain salt.

Thesaurus

Closest in meaning: saturn, uranus, northwind, poseidon, sea, ocean, marine, maritime, aquatic, pelagic, deep, briny, watery, saltwater, earthshaker, sea-king

Translations

Every language

name Roman god of earthquakes and the ocean

EspañolNeptuno
한국어넵튠 neptyun
日本語ネプチューン nepuchūn, ネプトゥヌス neputunusu
中文涅普頓 /涅普顿 Nièpǔdùn, 尼普頓 /尼普顿 Nípǔdùn
KiswahiliNeptuni
PortuguêsNetuno
FrançaisNeptune
DeutschNeptun
ItalianoNettuno
RomânăNeptun
РусскийНепту́н Neptún

name personification of the ocean

FrançaisNeptune

name eighth planet of the Solar System

EspañolNeptuno
한국어해왕성 haewangseong
日本語ネプチューン Nepuchūn, ネプトゥーン 海王星 Neputūn
中文海王星 Hǎiwángxīng
हिन्दीनेप्च्युन nepcyun, वरुण varuṇ
KiswahiliNeptuni, Kausi
PortuguêsNetuno
FrançaisNeptune
DeutschNeptun
ItalianoNettuno
ΕλληνικάΠοσειδώνας Poseidónas
RomânăNeptun
РусскийНепту́н Neptún
Tiếng Việtsao Hải Vương, Sao Hải Vương
العربيةنِبْتُون niptūn
עבריתנפטון néptun, רהב raháv

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MLA

"neptune." Wiktionary, via Micwyn, micwyn.com/word/neptune. Accessed 6 Nov. 2026.

APA

neptune. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/neptune

Chicago

"neptune." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/neptune.

BibTeX
@misc{neptune_2026,
  title = {neptune},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/neptune},
  urldate = {2026-11-06}
}