extragalactic

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adjective ex·tra·ga·lac·tic \ˌek-strə-gə-ˈlak-tik\

Definition of extragalactic

  1. :  originating or existing outside the Milky Way galaxy; also :  of or relating to extragalactic space extragalactic astronomy

Origin and Etymology of extragalactic

International Scientific Vocabulary


First Known Use: 1851

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the point at which something begins

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