background radiation

[ băk′ground′ ]

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Relatively constant low-level radiation from environmental sources such as building materials, cosmic rays, and ingested radionucleides in the body.

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Words nearby background radiation

“We saw his background and he was a Bronx guy and we started breaking the case,” Boyce says.
Shot Down During the NYPD Slowdown|Michael Daly|January 7, 2015|DAILY BEAST
The following page details a tribute gag the Simpsons team inserted into the background of a scene.
Here’s the Lost Judd Apatow ‘Simpsons’ Episode, Penned by Judd Apatow|Asawin Suebsaeng|January 6, 2015|DAILY BEAST
But there's a ton of value for me in my background and my history, and losing it would be a shame.
My Week on Jewish Tinder|Emily Shire|January 5, 2015|DAILY BEAST
Desert Golfing is the gaming equivalent of putting TV on in the background.
Lost For Thousands of Strokes: 'Desert Golfing' Is 'Angry Birds' as Modern Art|Alec Kubas-Meyer|January 2, 2015|DAILY BEAST

But, but … there was a token black girl in the background, Target cried in its defense!
One Vogue Cover Doesn’t Solve Fashion’s Big Race Problem|Danielle Belton|January 2, 2015|DAILY BEAST
There is always in the background of my mind dread lest help should reach the enemy before we have done with Sedd-el-Bahr.
Gallipoli Diary, Volume I|Ian Hamilton
But she was young enough and pretty enough to pay little heed to pose or background.
The Red Year|Louis Tracy
Against the blue background of the sky, green hill-tops trace an undulant line.
Bastien Lepage|Fr. Crastre
There was an exclamation of horror in the background, and Monsieur de Gaubert thrust himself forward.
St. Martin's Summer|Rafael Sabatini
The banks of the river are flat, and fringed with underwood and young trees; the background is formed by ranges of hills.
A Woman's Journey Round the World|Ida Pfeiffer

background radiation

Low-level radiation at the surface of the Earth that comes from cosmic rays and from small amounts of radioactive materials in rocks and the atmosphere.