chromosphere

[ 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 formschro·mo·spher·ic [kroh-muh-sfer-ik, -sfeer-] /ˌkroʊ məˈsfɛr ɪk, -ˈsfɪər-/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for chromosphere

British Dictionary definitions for chromosphere

chromosphere

/ (ˈkrəʊməˌsfɪə) /

noun

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 Formschromospheric (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

Word Origin and History for chromosphere

chromosphere


n.

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

Science definitions for chromosphere

chromosphere

[ krōmə-sfîr′ ]

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.