protogalaxy

protogalaxy
/proh'toh gal"euhk see, proh"toh gal'-/, n., pl. protogalaxies. Astron.
the large concentration of gas and dust from which a galaxy is formed.
[1945-50; PROTO- + GALAXY]

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      in cosmology, vast cloud of gas that by contraction and condensation becomes a galaxy of stars. In evolutionary (“big-bang”) models of creation, protogalaxies appear early in the expansion phase of the universe; in the steady-state model (steady-state theory) they are slowly but continually forming from newly created matter.

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Universalium. 2010.

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