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flare star

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noun Astronomy.
  1. a dwarf star that exhibits sudden increases of magnitude similar to solar flares.
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Origin of flare star

First recorded in 1950–55
Also called UV Ceti star.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for flare star

flare star

noun
  1. a red dwarf star in which outbursts, thought to be analogous to solar flares, occur, increasing the luminosity by several magnitudes in a few minutes
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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

flare star in Science

flare star

[flâr]
  1. A variable star that sporadically displays sudden increases in brightness, sometimes becoming six times as bright in a matter of only a few minutes, after which it gradually fades back to its normal brightness. The cause of this phenomenon is thought to be an event similar to a solar flare, but on a more intense scale with a much higher emission of x-rays.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.