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protoplanet

[ proh-toh-plan-it ]
/ ˈproʊ toʊˌplæn ɪt /
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noun Astronomy.
the collection of matter, in the process of condensation, from which a planet is formed.
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Origin of protoplanet

First recorded in 1945–50; proto- + planet
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use protoplanet in a sentence

British Dictionary definitions for protoplanet

protoplanet
/ (ˌprəʊtəʊˈplænɪt) /

noun
a planet in its early stages of evolution by the process of accretion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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