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solar prominence

noun, Astronomy
1.
prominence (def 3).

prominence

[prom-uh-nuh ns] /ˈprɒm ə nəns/
noun
1.
Also, prominency. the state of being prominent; conspicuousness.
2.
something that is prominent; a projection or protuberance:
a prominence high over a ravine.
3.
Also called solar prominence. Astronomy. an eruption of a flamelike tongue of relatively cool, high-density gas from the solar chromosphere into the corona where it can be seen during a solar eclipse or by observing strong spectral lines in its emission spectrum.
Origin
1590-1600
1590-1600; < Latin prōminentia a jutting out, protuberance. See prominent, -ence
Related forms
nonprominence, noun
overprominence, noun
Synonyms
2. promontory, height, precipice, peak.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for solar prominences

prominence

/ˈprɒmɪnəns/
noun
1.
the state or quality of being prominent
2.
something that is prominent, such as a protuberance
3.
relative importance or consequence
4.
(astronomy) an eruption of incandescent gas from the sun's surface that can reach an altitude of several hundred thousand kilometres. Prominences are visible during a total eclipse. When viewed in front of the brighter solar disc, they are called filaments
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 solar prominences
prominence
1590s, from Fr. prominence (16c.), from L. prominentia "a jutting out" (see prominent).
Online Etymology Dictionary, © 2010 Douglas Harper
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solar prominences in Medicine

prominence prom·i·nence (prŏm'ə-nəns)
n.

  1. The quality or condition of being prominent.

  2. A small projection or protuberance.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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solar prominences in Science
prominence
  (prŏm'ə-nəns)   
An eruption of tonguelike clouds of glowing ionized gas extending from the Sun's chromosphere and sometimes reaching hundreds of thousands of kilometers into space. When viewed against the solar surface instead of along the edges of its disk, prominences appear as dark, sinuous lines known as filaments. Usually associated with sunspot activity, solar prominences can influence Earth's atmosphere by interfering with electromagnetic activity. ◇ Active prominences erupt suddenly and usually disappear within minutes or hours. Quiescent prominences form more smoothly and can last for several months. See also solar flare.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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