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WordReference Random House Learner's Dictionary of American English © 2024com•et /ˈkɑmɪt/USA pronunciation n. [countable]- Astronomya body in space made up of a bright, central solid mass and a tail of dust and gas and that orbits the sun:Halley's comet.
com•et•ar•y /ˈkɑmɪˌtɛri/USA pronunciation adj. WordReference Random House Unabridged Dictionary of American English © 2024com•et (kom′it),USA pronunciation n. [Astron.]- Astronomya 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.
- Greek komé̄tēs wearing long hair, equivalent. to komē-, variant stem of komân to let one's hair grow (derivative of kómē hair) + -tēs agent suffix
- Latin comētēs, comēta
- Anglo-French, Old French
- 1150–1200; Middle English comete
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