extragalactic nebula extragalactic • extragastric · · · Info · Definitions · Synonyms · Characters · · extragalactic nebula · · Text Common · · Latin · · Scripts 20 · · Length 8 · · Syllables Definitions · · · (noun) (astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust. Synonyms: galaxy, extragalactic nebula. Example: "`extragalactic nebula' is a former name for `galaxy'." · · Noun Definition 1 Synonyms · · · galaxy · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 c latin small letter c U+0063 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 x latin small letter x U+0078