Definition of cosmic ray
English to English noun - highly penetrating ionizing radiation of extraterrestrial origin; consisting chiefly of protons and alpha particles; collision with atmospheric particles results in rays and particles of many kinds
source: WordNet 3.0
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Nearby Word
cosmic ray, comicry, cownose ray, cenozoic era, commissary, commiserate, congiary, commiserable, conscript, commissar, commiseration, ciconia nigra, commissure, concessory, concur, concordant, conservator, concordance, conakry, concrew
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