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terrestrial radiation

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noun
  1. long-wave electromagnetic radiation in the form of heat emitted from the earth's surface and atmosphere.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
terrestrial radiation in Science

terrestrial radiation

  1. Long-wave electromagnetic radiation originating from Earth and its atmosphere. It is the radiation emitted by naturally radioactive materials on Earth including uranium, thorium, and radon.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.