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We found 19 dictionaries with English definitions that include the word spiral galaxy: Click on the first link on a line below to go directly to a page where "spiral galaxy" is defined. General (14 matching dictionaries) spiral galaxy: American Heritage Dictionary of the English Language [home, info] spiral galaxy: Collins English Dictionary [home, info] spiral galaxy: Vocabulary.com [home, info] spiral galaxy: Merriam-Webster's Online Dictionary, 11th Edition [home, info] spiral galaxy: Infoplease Dictionary [home, info] spiral galaxy: Dictionary.com [home, info] spiral galaxy: UltraLingua English Dictionary [home, info] Spiral galaxy: Wikipedia, the Free Encyclopedia [home, info] spiral galaxy: Rhymezone [home, info] spiral galaxy: Free Dictionary [home, info] spiral galaxy: Mnemonic Dictionary [home, info] spiral galaxy: WordNet 1.7 Vocabulary Helper [home, info] spiral galaxy: LookWAYup Translating Dictionary/Thesaurus [home, info] spiral galaxy: Dictionary/thesaurus [home, info] Computing (1 matching dictionary) spiral galaxy: Encyclopedia [home, info] Science (3 matching dictionaries) Spiral Galaxy: Eric Weisstein's World of Astronomy [home, info] Spiral Galaxy: Extragalactic Astronomy [home, info] SPIRAL GALAXY: Zoom Astronomy Glossary [home, info] Tech (1 matching dictionary) spiral galaxy: JPL Terms [home, info]

Quick definitions from WordNet (spiral galaxy) ▸ noun:  a galaxy having a spiral structure; arms containing younger stars spiral out from old stars at the center