ALL meanings of protogalaxy
pro·to·gal·ax·y
P p - noun plural protogalaxy the large concentration of gas and dust from which a galaxy is formed. 1
- noun protogalaxy a cloud of gas in the early stages of its evolution into a galaxy 0
- noun protogalaxy in some cosmological theories, a huge cloud of dust and hydrogen gas out of which millions of protostars are formed 0