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cosmological principle
cosmology
cosmonaut
cosmopolis
cosmopolitan
cosmopolite
cosmos (1)
cosmos (2)
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cosmic ray
cos·mic ray (plural cos·mic rays)


noun 
Definition:
 
high-energy radiation from space: a stream of high-energy radiation that reaches Earth from outer space
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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