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background radiation
background radiation definition - medical
back·ground radiation (băkˈgroundˌ)
noun Relatively constant low-level radiation from environmental sources such as building materials, cosmic rays, and ingested radionucleides in the body.
The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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