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Noun extragalactic nebula has 1 sense
- galaxy, extragalactic nebula - (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'"
--1 is a kind of collection, aggregation, accumulation, assemblage
--1 is a member of
--1 has members: star
--1 has substances: cosmic dust
--1 has particulars: