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redshift

or red shift

[red-shift] /ˈrɛdˌʃɪft/
noun, Astronomy
1.
a shift toward longer wavelengths of the spectral lines emitted by a celestial object that is caused by the object moving away from the earth.
Origin of redshift
1920-1925
1920-25; red1 + shift
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for red shift

redshift

/ˈredˌʃɪft/
noun
1.
a shift in the lines of the spectrum of an astronomical object towards a longer wavelength (the red end of an optical spectrum), relative to the wavelength of these lines in the terrestrial spectrum, usually as a result of the Doppler effect caused by the recession of the object Compare blueshift
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Contemporary definitions for red shift
noun

in astronomy, an increase in the wavelength of radiation emitted by astronomical objects, causing a shift of features in their spectra towards longer wavelengths due to their recession from the observer

Usage Note

science

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red shift in Science
red shift  
See under Doppler effect.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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red shift in Culture

red shift definition


In physics, the reddening of light sent out by an object that is moving away from an observer. (See Doppler effect.)

Note: The red shift that can be observed in light from distant galaxies suggests that the universe is expanding, and thus supports the Big Bang theory.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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