Try Our Apps


Gobble up these 8 terms for eating

cosmic background radiation

noun, Astronomy.
electromagnetic radiation coming from every direction in the universe, considered the remnant of the big bang and corresponding to the black-body radiation of 3 K, the temperature to which the universe has cooled.
Also called cosmic microwave background. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Contemporary definitions for cosmic-background-radiation

microwave radiation in the universe, produced during the Big Bang and subsequently thinned and cooled as the universe expanded; also called background radiation

Usage Note

science's 21st Century Lexicon
Copyright © 2003-2014, LLC
Cite This Source
cosmic-background-radiation in Science
cosmic background radiation  
Weak radio-frequency radiation traveling through outer space with equal intensity in every direction. It is thought to be residual radiation from a period shortly following the big bang, when the universe was very hot. Also called microwave background.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Word Value for cosmic

Scrabble Words With Friends

Nearby words for cosmic-background-radiation