asteroid

[ as-tuh-roid ]

/ ˈæs təˌrɔɪd /

SEE SYNONYMS FOR asteroid ON THESAURUS.COM

noun

Astronomy. any of millions of small celestial objects revolving around the sun, often irregularly shaped and having a great range in size, from as small as 6 feet (2 meters) across to about 620 miles (998 kilometers) across: the vast majority of known asteroids exist within the asteroid belt. See also small solar system body.

Zoology. a starfish; an asteroidean.

adjective

starlike.

Origin of asteroid

First recorded in 1795–1805; from Greek asteroeidḗs “starry, starlike”; see star, -oid

OTHER WORDS FROM asteroid

as·ter·oi·dal, adjectivein·ter·as·ter·oi·dal, adjective

Words nearby asteroid

asterism, asterixis, astern, asternal, asternia, asteroid, asteroid belt, asteroid body, Asteroidea, asteroidean, asteroid hyalosis

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for asteroid

What would it take to carry people to the Moon, or Mars, or an asteroid?
To Infinity and Beyond! NASA’s Orion Mission Blasts Off|Matthew R. Francis|December 4, 2014|DAILY BEAST
Thinking of longer journeys to Mars or an asteroid would require careful measurement of conditions.
To Infinity and Beyond! NASA’s Orion Mission Blasts Off|Matthew R. Francis|December 4, 2014|DAILY BEAST
His game lasts until his final ship has either collided with an asteroid or lost a shootout with an enemy saucer.
‘Asteroids’ & The Dawn of the Gamer Age|David Owen|November 29, 2014|DAILY BEAST
The Asteroid Belt in the Solar System has many such gaps, created by the gravity of the Sun and Jupiter.
The Most Stunning View Ever of Planets Being Born|Matthew R. Francis|November 9, 2014|DAILY BEAST

For the record, Deep Impact is about a comet, not an asteroid.
U.S.—Russia Tensions Nuke Plans For Real-Life ‘Armageddon’ Asteroid Defense|Asawin Suebsaeng|August 4, 2014|DAILY BEAST
I told Kinkare to put her into the same orbit as the asteroid belt.
The Giants From Outer Space|Geoff St. Reynard
Mining atomic power metals in the asteroid belt would bring the biggest returns, he said.
The Black Tide|Arthur G. Stangland
His first action on getting back to the asteroid would be to recommend Santos' promotion to Terra base.
Rip Foster in Ride the Gray Planet|Harold Leland Goodwin
As Rip watched, fire spurted from the cruiser, and it moved with gathering speed toward the asteroid's horizon.
Rip Foster in Ride the Gray Planet|Harold Leland Goodwin
Anything that kept them from selling an asteroid must be terrible indeed.
The Planetoid of Peril|Paul Ernst

British Dictionary definitions for asteroid

asteroid

/ (ˈæstəˌrɔɪd) /

noun

Also called: minor planet, planetoid any of numerous small celestial bodies that move around the sun mainly between the orbits of Mars and Jupiter. Their diameters range from 930 kilometres (Ceres) to less than one kilometre

Also called: asteroidean (ˌæstəˈrɔɪdɪən) any echinoderm of the class Asteroidea; a starfish

adjective Also: asteroidal (ˌæstəˈrɔɪdəl)

of, relating to, or belonging to the class Asteroidea

shaped like a star

Word Origin for asteroid

C19: from Greek asteroeidēs starlike, from astēr a star

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 asteroid

asteroid

[ (as-tuh-royd) ]

A small planet that revolves around the sun. The largest asteroid is only about six hundred miles in diameter. (See asteroid belt.)

Scientific definitions for asteroid

asteroid

[ ăs′tə-roid′ ]

Any of numerous small solar system bodies that orbit the Sun primarily in the asteroid belt, a region between the orbits of Mars and Jupiter. Asteroids are intermediate in size between planets and meteoroids with diameters that measure between approximately one hundred and several hundred kilometers. While more than 1,800 asteroids have been cataloged, and as many as a million or more smaller ones may exist, their total mass has been estimated to be less than three percent of the Moon's. Asteroids are thought to be left over from the early formation of the solar system, when planetesimals in a protoplanetary disk were scattered after coming under Jupiter's gravitational influence. The continuing collision of planetesimals that remained between Jupiter and Mars caused many of them to fragment, creating the asteroids that exist today. Also called minor planet planetoid

单词	asteroid
释义	asteroid [ as-tuh-roid ] / ˈæs təˌrɔɪd / SEE SYNONYMS FOR asteroid ON THESAURUS.COM noun Astronomy. any of millions of small celestial objects revolving around the sun, often irregularly shaped and having a great range in size, from as small as 6 feet (2 meters) across to about 620 miles (998 kilometers) across: the vast majority of known asteroids exist within the asteroid belt. See also small solar system body. Zoology. a starfish; an asteroidean. adjective starlike. Origin of asteroid First recorded in 1795–1805; from Greek asteroeidḗs “starry, starlike”; see star, -oid OTHER WORDS FROM asteroid as·ter·oi·dal, adjectivein·ter·as·ter·oi·dal, adjective Words nearby asteroid asterism, asterixis, astern, asternal, asternia, asteroid, asteroid belt, asteroid body, Asteroidea, asteroidean, asteroid hyalosis Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for asteroid What would it take to carry people to the Moon, or Mars, or an asteroid? To Infinity and Beyond! NASA’s Orion Mission Blasts Off\|Matthew R. Francis\|December 4, 2014\|DAILY BEAST Thinking of longer journeys to Mars or an asteroid would require careful measurement of conditions. To Infinity and Beyond! NASA’s Orion Mission Blasts Off\|Matthew R. Francis\|December 4, 2014\|DAILY BEAST His game lasts until his final ship has either collided with an asteroid or lost a shootout with an enemy saucer. ‘Asteroids’ & The Dawn of the Gamer Age\|David Owen\|November 29, 2014\|DAILY BEAST The Asteroid Belt in the Solar System has many such gaps, created by the gravity of the Sun and Jupiter. The Most Stunning View Ever of Planets Being Born\|Matthew R. Francis\|November 9, 2014\|DAILY BEAST For the record, Deep Impact is about a comet, not an asteroid. U.S.—Russia Tensions Nuke Plans For Real-Life ‘Armageddon’ Asteroid Defense\|Asawin Suebsaeng\|August 4, 2014\|DAILY BEAST I told Kinkare to put her into the same orbit as the asteroid belt. The Giants From Outer Space\|Geoff St. Reynard Mining atomic power metals in the asteroid belt would bring the biggest returns, he said. The Black Tide\|Arthur G. Stangland His first action on getting back to the asteroid would be to recommend Santos' promotion to Terra base. Rip Foster in Ride the Gray Planet\|Harold Leland Goodwin As Rip watched, fire spurted from the cruiser, and it moved with gathering speed toward the asteroid's horizon. Rip Foster in Ride the Gray Planet\|Harold Leland Goodwin Anything that kept them from selling an asteroid must be terrible indeed. The Planetoid of Peril\|Paul Ernst British Dictionary definitions for asteroid asteroid / (ˈæstəˌrɔɪd) / noun Also called: minor planet, planetoid any of numerous small celestial bodies that move around the sun mainly between the orbits of Mars and Jupiter. Their diameters range from 930 kilometres (Ceres) to less than one kilometre Also called: asteroidean (ˌæstəˈrɔɪdɪən) any echinoderm of the class Asteroidea; a starfish adjective Also: asteroidal (ˌæstəˈrɔɪdəl) of, relating to, or belonging to the class Asteroidea shaped like a star Word Origin for asteroid C19: from Greek asteroeidēs starlike, from astēr a star 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 Words related to asteroid sphere, earth, globe, world, marble, orb, apple, planetoid, moon, rocket, spacecraft, luna, sputnik, terrene, ancillary Cultural definitions for asteroid asteroid [ (as-tuh-royd) ] A small planet that revolves around the sun. The largest asteroid is only about six hundred miles in diameter. (See asteroid belt.) 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 asteroid asteroid [ ăs′tə-roid′ ] Any of numerous small solar system bodies that orbit the Sun primarily in the asteroid belt, a region between the orbits of Mars and Jupiter. Asteroids are intermediate in size between planets and meteoroids with diameters that measure between approximately one hundred and several hundred kilometers. While more than 1,800 asteroids have been cataloged, and as many as a million or more smaller ones may exist, their total mass has been estimated to be less than three percent of the Moon's. Asteroids are thought to be left over from the early formation of the solar system, when planetesimals in a protoplanetary disk were scattered after coming under Jupiter's gravitational influence. The continuing collision of planetesimals that remained between Jupiter and Mars caused many of them to fragment, creating the asteroids that exist today. Also called minor planet planetoid The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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asteroid

noun

adjective

Origin of asteroid

OTHER WORDS FROM asteroid

Words nearby asteroid

Example sentences from the Web for asteroid

British Dictionary definitions for asteroid

noun

adjective Also: asteroidal (ˌæstəˈrɔɪdəl)

Word Origin for asteroid

Words related to asteroid

Cultural definitions for asteroid

Scientific definitions for asteroid