| 单词 | neptune |
| 释义 | neptune[ nep-toon, -tyoon ] / ˈnɛp tun, -tyun / nounany whelk of the genus Neptunea, especially N. decemcostata, common along the eastern coast of North America and having a shell with seven to ten raised reddish-brown spiral ridges on a pale beige or yellow background. Origin of neptune<New Latin Neptunea;see Neptune, -ea Words nearby neptunenepit, ne plus ultra, nepman, Nepos, nepotism, neptune, Neptunian, neptunium, neptunium series, neral, NERC Definition for neptune (2 of 2)Neptune [ nep-toon, -tyoon ] / ˈnɛp tun, -tyun / nounthe ancient Roman god of the sea, identified with the Greek god Poseidon. the sea or ocean: Neptune's mighty roar. Astronomy. the planet eighth in order from the sun, having an equatorial diameter of 30,200 miles (48,600 km), a mean distance from the sun of 2794.4 million miles (4497.1 million km), a period of revolution of 164.81 years, and two moons. a township in E New Jersey. Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for neptuneBritish Dictionary definitions for neptune (1 of 2)Neptune1 / (ˈnɛptjuːn) / nounthe Roman god of the seaGreek counterpart: Poseidon British Dictionary definitions for neptune (2 of 2)Neptune2 / (ˈnɛptjuːn) / nounthe eighth planet from the sun, having fourteen known satellites, the largest being Triton and Nereid, and a faint planar system of rings or ring fragments. Mean distance from sun: 4497 million km; period of revolution around sun: 164.8 years; period of rotation: 14 to 16 hours; diameter and mass: 4.0 and 17.2 times that of earth respectively Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cultural definitions for neptune (1 of 2)Neptune [Greek name Poseidon]The Roman and Greek god who ruled the sea. notes for NeptuneNeptune is frequently portrayed as a bearded giant with a fish's scaly tail, holding a large three-pronged spear, or trident. notes for NeptuneThe eighth planet from the sun (the Earth is third) is named Neptune. Cultural definitions for neptune (2 of 2)Neptune In astronomy, a major planet, the eighth planet from the sun. Neptune is named for the Roman god of the sea. Neptune is similar in size and composition to Uranus. It is usually visible only through a telescope and was discovered in the 1840s. For a period ending in 1999, Pluto's orbit took it inside the orbit of neptune. (See solar system; see under “Mythology and Folklore.”) notes for NeptuneSome astronomers have suggested that Pluto is not a planet in the usual sense but is an object more like an asteroid, and that Neptune, therefore, is actually the outermost planet. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. Scientific definitions for neptuneNeptune [ nĕp′tōōn′ ] The eighth planet from the Sun and the fourth largest, with a diameter almost four times that of Earth. Neptune is a gas giant with a very active weather system, exhibiting extremely long and powerful storms with the fastest winds observed in the solar system. Neptune's axis is tilted 28.8° from the plane of its orbit, and its summer and winter seasons each last 40 years. For a period of 20 years out of every 248, Pluto's highly elliptical orbit crosses within that of Neptune. Neptune has four faint rings and 13 known moons and appears blue due to the absorption of red light by the methane within its atmosphere. See Table at solar system. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
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