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[kroh-muh-sfeer] /ˈkroʊ məˌsfɪər/
noun, Astronomy
a scarlet, gaseous envelope surrounding the sun outside the photosphere, from which enormous quantities of hydrogen and other gases are erupted.
a gaseous envelope surrounding a star.
Origin of chromosphere
1865-70; chromo- + -sphere
Related forms
[kroh-muh-sfer-ik, -sfeer-] /ˌkroʊ məˈsfɛr ɪk, -ˈsfɪər-/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for chromosphere
  • With a hydrogen alpha solar telescope, you can observe prominences and filaments in the chromosphere.
  • The chromosphere can be seen only when filtering out the bright light of the photosphere.
  • The chromosphere is more visually transparent than the photosphere.
British Dictionary definitions for chromosphere


a gaseous layer of the sun's atmosphere extending from the photosphere to the corona and visible during a total eclipse of the sun
Derived Forms
chromospheric (ˌkrəʊməˈsfɛrɪk) adjective
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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Word Origin and History for chromosphere

1868, coined by English astronomer Sir Joseph Norman Lockyer (1836-1920), from chromo-, from Greek khroma "color" (see chroma) + sphere. So called for its redness.

Online Etymology Dictionary, © 2010 Douglas Harper
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chromosphere in Science
A glowing, transparent layer of gas surrounding the photosphere of a star. The Sun's chromosphere is several thousand kilometers thick, is composed mainly of hydrogen at temperatures of 6,000° to 20,000°K, and gives off reddish light.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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