noun
quasar
KWAY-zah
noun
1
An extremely bright and distant celestial object, powered by a supermassive black hole, that appears starlike from Earth.
"Quasars are among the most luminous objects in the universe."
"Astronomers detected a quasar billions of light-years away."
How to Use Quasar
Learner’s notesIn plain EnglishA super-bright, distant object in deep space powered by a giant black hole.
Word Forms
quasars plural
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_____ are among the most luminous objects in the universe.
Etymology
A blend of "quasi-stellar," coined in 1964 to describe these starlike radio sources.