Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun extragalactic_nebula

1 sense of extragalactic nebula

Sense 1
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'")
       => collection, aggregation, accumulation, assemblage -- (several things grouped together or considered as a whole)