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Definition of "meteoroid" [me•te•or•oid]

  • A solid body, moving in space, that is smaller than an asteroid and at least as large as a speck of dust. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "meteoroid" in a sentence
  • "A meteoroid is matter revolving around the sun or any object in interplanetary space that is too small to be called an asteroid or a comet."
  • "Once this space material starts falling toward Earth, it's called a meteoroid, and when it penetrates the Earth's atmosphere, it becomes a meteor, which is the term used to describe the visible "shooting star" portion."
  • "A meteor appears when a particle or chunk of metallic or stony matter called a meteoroid enters Earth's atmosphere from outer space."
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