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bla·zar(blā′zär′, -sär′, -zər, -sər)
A compact, extremely bright, active galactic nucleus characterized by strong and rapid changes in the intensity of electromagnetic radiation emitted over a very broad range of frequencies ranging from radio waves to gamma rays. Although the source of blazar energy is the material surrounding a super-massive black hole at the galaxy center, much of the blazar luminosity originates in powerful jets of material moving along the line of sight toward Earth at near light speed.
[Coined by Edward A. Spiegel (1931-2010), American astronomer, as a blend (influenced by blaze) of BL Lac object, a type of blazar once thought to be a variable star (after BL Lacertae, a blazar in Lacerta), and quasar.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
a type of galaxy supplying more radiation than a quasar
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014