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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

qua·sar

Audio Help [kwey-zahr, -zer, -sahr, -ser] Pronunciation Key

–noun Astronomy.

one of over a thousand known extragalactic objects, starlike in appearance and having spectra with characteristically large redshifts, that are thought to be the most distant and most luminous objects in the universe.

Also called quasi-stellar object.

[Origin: 1960–65; quas(i-stell)ar, in quasi-stellar radio source, the first type of quasar discovered

]

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

Encyclopædia Britannica, Inc.
quasar

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American Heritage Dictionary - Cite This Source - Share This

qua·sar Audio Help (kwā'zär', -sär', -zər, -sər) Pronunciation Key
n. An extremely distant, and thus old, celestial object whose power output is several thousand times that of our entire galaxy.

[quas(i-stellar) + (st)ar.]

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

Online Etymology Dictionary - Cite This Source - Share This
quasar

1964, from "quas(i-stell)ar radio source" (1963).

WordNet - Cite This Source - Share This

quasar
noun
a starlike object that may send out radio waves and other forms of energy; many have large red shifts

Kernerman English Multilingual Dictionary (Beta Version) - Cite This Source - Share This
quasar [ˈkweisaː] noun

a star-like object which gives out light and radio waves

Arabic:	كْوازار: جِسْم نَجْمي
Chinese (Simplified):	类星体
Chinese (Traditional):	類星體
Czech:	kvazar
Danish:	kvasar
Dutch:	quasar
Estonian:	kvasar
Finnish:	kvasaari
French:	quasar
German:	der Quasar
Greek:	κβάζαρ (ημιαστρική ραδιοπηγή)
Hungarian:	kvazár
Icelandic:	dulstirni, kvasi
Indonesian:	kuasar
Italian:	quasar

Japanese:	準星
Korean:	퀘이사, 준성(準星) 전파원
Latvian:	kvazārs
Lithuanian:	kvazaras
Norwegian:	kvasar
Polish:	kwazar
Portuguese (Brazil):	quasar
Portuguese (Portugal):	quasar
Romanian:	cuasar
Russian:	квазар
Slovak:	kvasar
Slovenian:	kvazar
Spanish:	quasar
Swedish:	kvasar
Turkish:	kuazar

The American Heritage Science Dictionary - Cite This Source - Share This

quasar Audio Help (kwā'zär') Pronunciation Key
Short for quasi-stellar radio source. A compact, starlike celestial body with a power output greater than our entire galaxy. Believed to be the oldest and most distant objects ever detected, quasars are billions of light-years from Earth and moving away from us at nearly 80 percent of the speed of light. For this reason, quasars are highly important to astronomers' understanding of the early universe. Little is currently understood about the nature of quasars; one theory suggests that they are produced by giant black holes destroying enormous amounts of matter, causing the subsequent ejection of radiation along their north and south poles. Many astronomers believe that quasars represent an early stage in the evolution of galaxies such as our own. See also blazar , Seyfert galaxy.

American Heritage Abbreviations Dictionary 3rd Edition - Cite This Source - Share This

quasar
quasi-stellar object

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