[proh-toh-gal-uh k-see, proh-toh-gal-]
noun, plural pro·to·gal·ax·ies. Astronomy.
the large concentration of gas and dust from which a galaxy is formed.
Origin of protogalaxy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -axies
a cloud of gas in the early stages of its evolution into a galaxy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012