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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
First recorded in 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. 2018.
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Examples from the Web for chromosphere
Historical Examples
  • The outer surface of the chromosphere is not by any means even.

    Astronomy of To-day Cecil G. Dolmage
  • Their light shines through the chromosphere and the spots are ruptures in this envelope.

    Astronomy David Todd
  • Beneath the chromosphere is the layer of the sun from which emanates the light by which we see it, called the photosphere.

    Astronomy David Todd
  • He argues that it is formed within the mass of cooled hydrogen drawn from the chromosphere into the vortex of the cyclone.

  • Just above the reversing layer lies the chromosphere, which is between five thousand and ten thousand miles in depth.

    Astronomy for Young Folks Isabel Martin Lewis
  • The greater the solar activity the more is the chromosphere charged with the vapors of the lower strata of the sun's atmosphere.

    Astronomy for Young Folks Isabel Martin Lewis
  • A third layer or envelope immediately lying over the last one is the region known as the chromosphere.

  • One more picture of prominences (Fig. 80) is introduced to show the continuous stretch of chromosphere out of which they spring.

    A Text-Book of Astronomy George C. Comstock
  • Slender columns can ordinarily be seen to connect the surface of the chromosphere with its outlying portions.

  • This layer is much thinner than the chromosphere, and may be considered to form the base of the latter.

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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