Definitions for Neptuneˈnɛp tun, -tyun

This page provides all possible meanings and translations of the word Neptune

Random House Webster's College Dictionary

Nep•tuneˈnɛp tun, -tyun(n.)

  1. the Roman god of the sea, identified with the Greek god Poseidon.

    Category: Mythology

  2. the sea or ocean:

    Neptune's mighty roar.

  3. the planet eighth in order from the sun, having an equatorial diameter of 30,200 mi. (48,600 km), a mean distance from the sun of 2794.4 million mi. (4497.1 million km), a period of revolution of 164.81 years, and at least six moons.

    Category: Astronomy

Nep•tu′ni•an(adj.)

Princeton's WordNet

  1. Neptune(noun)

    (Roman mythology) god of the sea; counterpart of Greek Poseidon

  2. Neptune(noun)

    a giant planet with a ring of ice particles; the 8th planet from the sun is the most remote of the gas giants

    "the existence of Neptune was predicted from perturbations in the orbit of Uranus and it was then identified in 1846"

Wiktionary

  1. Neptune(ProperNoun)

    The god of the ocean and of earthquakes.

  2. Neptune(ProperNoun)

    The eighth planet in our solar system, represented in astronomy and astrology by u2646.

  3. Origin: From Neptunus.

Webster Dictionary

  1. Neptune(noun)

    the son of Saturn and Ops, the god of the waters, especially of the sea. He is represented as bearing a trident for a scepter

  2. Neptune(noun)

    the remotest known planet of our system, discovered -- as a result of the computations of Leverrier, of Paris -- by Galle, of Berlin, September 23, 1846. Its mean distance from the sun is about 2,775,000,000 miles, and its period of revolution is about 164,78 years

Freebase

  1. Neptune

    Neptune is the eighth and farthest planet from the Sun in the Solar System. It is the fourth-largest planet by diameter and the third-largest by mass. Among the gaseous planets in the solar system, Neptune is the most dense. Neptune is 17 times the mass of Earth and is slightly more massive than its near-twin Uranus, which is 15 times the mass of Earth but not as dense. On average, Neptune orbits the Sun at a distance of 30.1 AU, approximately 30 times the Earth–Sun distance. Named for the Roman god of the sea, its astronomical symbol is ♆, a stylised version of the god Neptune's trident. Neptune was the first planet found by mathematical prediction rather than by empirical observation. Unexpected changes in the orbit of Uranus led Alexis Bouvard to deduce that its orbit was subject to gravitational perturbation by an unknown planet. Neptune was subsequently observed on 23 September 1846 by Johann Galle within a degree of the position predicted by Urbain Le Verrier, and its largest moon, Triton, was discovered shortly thereafter, though none of the planet's remaining 12 moons were located telescopically until the 20th century. Neptune has been visited by only one spacecraft, Voyager 2, which flew by the planet on 25 August 1989.

The Nuttall Encyclopedia

  1. Neptune

    the chief marine deity of the Romans, and identified with the Poseidon of the Greeks, is represented with a trident in his hand as his sceptre.

  2. Neptune

    the remotest planet of the solar system at present known; it is twice as far distant from the sun as Uranus (q. v.) is, deemed before its discovery the remotest; its diameter is four times greater than that of the earth, and it takes 60,126 days to revolve round the sun, accompanied by a solitary satellite; it was discovered in 1846 by Adams (q. v.) and Leverrier (q. v.), who were guided to the spot where they found it from the effect of its neighbourhood on the movements of Uranus.

U.S. National Library of Medicine

  1. Neptune

    The eighth planet in order from the sun. It is one of the five outer planets of the solar system. Its two natural satellites are Nereid and Triton.

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