• synonyms

terrestrial planet

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noun Astronomy.
  1. inner planet.
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Origin of terrestrial planet

First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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terrestrial planet in Science

terrestrial planet

  1. See inner planet.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.