• synonyms


[proh-toh-gal-uh k-see, proh-toh-gal-]
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noun, plural pro·to·gal·ax·ies. Astronomy.
  1. the large concentration of gas and dust from which a galaxy is formed.
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Origin of protogalaxy

First recorded in 1945–50; proto- + galaxy
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for protogalaxy


noun plural -axies
  1. a cloud of gas in the early stages of its evolution into a galaxy
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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