Definition of extragalactic
: originating or existing outside the Milky Way galaxy; also : of or relating to extragalactic space extragalactic astronomy
Recent Examples of extragalactic from the Web
True, astronomers still don’t know the origins of these extragalactic milliseconds-long radio pulses, and until this year fewer than 20 had ever been detected.
But giant pulses from extragalactic pulsars could also be plausible.
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Origin and Etymology of extragalactic
International Scientific Vocabulary
First Known Use: 1851See Words from the same year
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