quasar Hear it!

quasar definition

☆ qua·sar (kwā′zär′, -sär′)

noun

any of a number of starlike celestial objects that emit immense amounts of light and, often, radio waves, characterized by having spectral lines with very large redshifts: quasars are thought to be the most distant and oldest observable objects in the universe

Etymology: < quas(i-stell)ar (radio source)

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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