noun
(astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust
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`extragalactic nebula' is a former name for `galaxy'
• Syn: ↑galaxy
• Hypernyms: ↑collection, ↑aggregation, ↑accumulation, ↑assemblage
• Hyponyms: ↑spiral galaxy, ↑spiral nebula, ↑Great Attractor, ↑Milky Way, ↑Milky Way Galaxy, ↑Milky Way System
• Instance Hyponyms: ↑Magellanic Cloud
• Member Meronyms: ↑star
• Substance Meronyms: ↑cosmic dust
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noun : galaxy 1b
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extragalactic nebula,
a nebula or galaxy present outside of our own galaxy; exterior galaxy; external galaxy: »
The Magellanic Clouds are extragalactic nebulae visible to the naked eye.
Useful english dictionary. 2012.