Meaning & use
asteroid
A small, rocky body that orbits the sun, smaller than a planet.
See it in a sentence
Scientists tracked an asteroid passing safely between Earth and the moon last week.
Most asteroids in our solar system orbit within a belt between Mars and Jupiter.
A note on using this word
Asteroid is distinct from comet, which is made largely of ice and dust rather than rock or metal.
Words with a similar meaning
minor planet
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