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Meaning of comet

com•et

Pronunciation: (kom'it), [key]
— n. Astron.
  1. a celestial body moving about the sun, usually in a highly eccentric orbit, consisting of a central mass surrounded by an envelope of dust and gas that may form a tail that streams away from the sun.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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