Cosmic-ray
noun, Physics.
1.
a radiation of high penetrating power that originates in outer space and consists partly of high-energy atomic nuclei.
cosmic ray
A ray of radiation of extraterrestrial origin, consisting of one or more charged particles such as protons, alpha particles, and larger atomic nuclei. Cosmic rays entering the atmosphere collide with atoms, producing secondary radiation, such as pions, muons, electrons, and gamma rays. Cosmic rays (and secondary radiation) can be easily seen in a cloud chamber.
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/ˈkɒzmiːn/ noun 1. (zoology) a substance resembling dentine, forming the outer layer of cosmoid scales
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- Cosmo
1. a combining form meaning “world,” “universe,” used in the formation of compound words: cosmography; in contemporary usage, sometimes representing Russian kosmo-, it may mean “outer space,” “space travel,” or “cosmic ray”: cosmonaut. combining form 1. indicating the world or universe: cosmology, cosmonaut, cosmography before a vowel cosm-, word-forming element from Latinized form of Greek […]