This shows grade level based on the word's complexity.
neptune
[ nep-toon, -tyoon ]
/ Ë?nÉ›p tun, -tyun /
Save This Word!
This shows grade level based on the word's complexity.
noun
any 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.
QUIZ
CUDDLE UP! A COZY QUIZ ON FALL WORDS HAS ARRIVED
If autumn is your ideal season, spice up your repertoire of "fall" vocabulary with this quiz on some warm and vivid descriptive words for the season.
Question 1 of 10
Which of the following words means “to make a crackling sound; crackle�
Meet Grammar CoachImprove Your Writing
Words nearby neptune
nepit, ne plus ultra, nepman, Nepos, nepotism, neptune, Neptunian, neptunium, neptunium series, neral, NERC
Other definitions for neptune (2 of 2)
Neptune
[ nep-toon, -tyoon ]
/ Ë?nÉ›p tun, -tyun /
noun
the 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 Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
How to use neptune in a sentence
British Dictionary definitions for neptune (1 of 2)
Neptune1
/ (Ë?nÉ›ptjuË?n) /
noun
the Roman god of the seaGreek counterpart: Poseidon
British Dictionary definitions for neptune (2 of 2)
Neptune2
/ (Ë?nÉ›ptjuË?n) /
noun
the 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
Scientific definitions for neptune
Neptune
[ nÄ•p′tÅÅn′ ]
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.
Cultural definitions for neptune (1 of 2)
notes for Neptune
Neptune is frequently portrayed as a bearded giant with a fish's scaly tail, holding a large three-pronged spear, or trident.
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.â€)
notes for Neptune
Some 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.