Web Results
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
asteroid | Define asteroid at Dictionary.com
The world's most popular free online dictionary with definitions, spell check, word origins, example sentences, audio pronunciations, Word of the Day and more!


Asteroids are minor planets, especially those of the inner Solar System. The larger ones have .... The term "asteroid", from the Greek word for "star-like", never had a formal definition, with the broader term minor planet being preferred by the  ...


The name "asteroid" means "like a star" in the ancient Greek language. Asteroids may look like small stars in the sky, but they really do move around the Sun, ...


An asteroid is like a comet. However, while comets are mostly made of ice, asteroids are made up of rock or even metal. This makes them dangerous because ...


Define asteroid: any one of thousands of small planets that circle around the sun — asteroid in a sentence.


Thousands of asteroids are in orbit around the sun. ... Sentences: NASA's Dawn spacecraft studies asteroids. Thousands ... Return to NASA's Picture Dictionary.


Asteroid definition, Also called minor planet. Astronomy. any of the thousands of small bodies of from 480 miles (775 km) to less than one mile (1.6 km) in ...


Nov 17, 2016 ... Asteroids are small, rocky objects that orbit the sun. Although asteroids orbit the sun like planets, they are much smaller than planets.


Asteroid definition: An asteroid is one of the very small planets that move around the sun between Mars and... | Meaning, pronunciation, translations and ...


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.