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

1 sense of spiral nebula

Sense 1
spiral galaxy, spiral nebula -- (a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center)
       => 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'")