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protoplanet
protoplanet definition
proto·planet (prōt′ō plan′it)
noun
in some cosmological theories, any of the hundreds of swirling clouds of dust and gas that form around a star and eventually evolve into individual planets
Related Forms:
- protoplanetary pro′to·plan′etar′y (-i ter′ē) adjective
Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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