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proton number
proton pump
proton pump inhibitor
proton synchrotron
protonema
protonics
protonotary
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protogalaxy
pro·to·gal·ax·y [ prtō gálləksee ] (plural pro·to·gal·ax·ies)


noun 
Definition:
 
hypothetical source of galaxies: a hypothetical cloud of gas believed to have been formed about 14 billion years ago from dark matter, neutral hydrogen, and helium, from which all the galaxies and stars evolved
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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