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Astronomy. any of the thousands of small bodies of from 480 miles (775 km) to less than one mile (1.6 km) in diameter that revolve about the sun in orbits lying mostly between those of Mars and Jupiter.
Zoology. an asteroidean; a starfish.
Source: Dictionary.com



The term "asteroid" is ill-defined. It never had a formal definition, with the broader term minor planet being preferred by the International Astronomical Union.

asteroid - Dictionary Definition : Vocabulary.com


An asteroid is a large, irregularly shaped object in space that orbits our Sun. If one of these giant rocks ends up on a collision course with Earth, we are in for big ...

Asteroid | Definition of Asteroid by Merriam-Webster


Define asteroid: any one of thousands of small planets that circle around the sun —usage, synonyms, more.

Definition: Asteroid Number : number assigned to an asteroid when it is discovered. It has no particular meaning except that asteroid N+1 was discovered after asteroid N. More »
By Nick Greene, About.com Guide

Asteroid dictionary definition | asteroid defined - YourDictionary


The definition of an asteroid is a rocky mass that orbits the sun. Facts About Astroids. More than 1,800 asteroids have been identifed in the solar system.

Asteroid - definition of asteroid by The Free Dictionary


Astronomy Any of numerous small solar system bodies that revolve around the sun, with orbits lying chiefly between Mars and Jupiter and characteristic ...

asteroid - definition of asteroid in English from the Oxford dictionary


A small rocky body orbiting the sun. Large numbers of these, ranging e.... Meaning, pronunciation and example sentences, English to English reference content.



The ajacent image shows the asteroid Gaspra, as photographed by the Galileo space probe (Ref). The name asteroids, meaning "star-like", derives from the fact  ...

What Are an Asteroid, a Meteor and a Meteorite | Define Asteroid ...


Feb 15, 2013 ... What is the difference between an asteroid, a meteoroid, a meteor and a ... An asteroid is a rocky object in space that's smaller than a planet ...

asteroid | Define asteroid at Dictionary.com
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Popular Q&A
Q: What is the definition of an asteroid?
A: As·ter·oid/?ast?roid/ Noun: A small rocky body orbiting the sun. Large Read More »
Source: www.chacha.com
Q: What si the definition of an asteroid.
A: Any of various very small planets orbiting around a sun. Read More »
Source: www.answers.com
Q: What is the definition of asteroid belt?
A: Our solar system's "asteroid belt" (Main Belt) is a belt of small, widely-scattered asteroids between Mars and Jupiter, where the material never formed a single... Read More »
Source: wiki.answers.com
Q: What is the definition of asteroid?
A: Pieces of rock material with similar composition to the planets. Read More »
Source: wiki.answers.com
Q: What is the definition of asteroid.
A: Asteroids are space rocks, orbiting objects with a similar composition to the planets. Asteroids are extremely numerous rocky objects circling the Sun, varying ... Read More »
Source: www.answers.com