spiral galaxy

English Thesaurus

1. a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center (noun.group)

hypernym	:	extragalactic nebula, galaxy,
definition	:	(astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust (noun.group)

hyponym	:	andromeda galaxy,
definition	:	a spiral galaxy in the constellation of Andromeda that is visible to the naked eye (noun.group)