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protogalaxy
pro·to·gal·ax·y P0616550 (prō′tō-găl′ək-sē)n. pl. pro·to·gal·ax·ies A cloud of gas, primarily hydrogen, that is forming a galaxy or has sufficient mass to eventually form a galaxy.protogalaxy (ˌprəʊtəʊˈɡæləksɪ) n, pl -axies (Astronomy) a cloud of gas in the early stages of its evolution into a galaxy
protogalaxy
protogalaxy (proh-toh-gal -ăks-ee) An inhomogeneous gas cloud in the early stages of evolution into a galaxy. See galaxies, formation and evolution.protogalaxy[‚prōd·ō′gal·ik·sē] (astronomy) A clump of matter in an early stage of galaxy formation in which the matter has started to collapse under its own gravity to form a galaxy. |