extragalactic nebula
1.
(
noun
) (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust; "`extragalactic nebula' is a former name for `galaxy'"
Synonyms:
galaxy
Related Words:
Magellanic Cloud
,
Milky Way
,
Milky Way Galaxy
,
Milky Way System
,
accumulation
,
aggregation
,
assemblage
,
collection
,
spiral galaxy
,
spiral nebula
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