Definitions

cosmic ray

NOUN

high-energy radiation from space

Synonyms

WEAK

aurora particles cosmic particle cosmic particles intergalactic matter radiation

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Cosmic-ray pioneer Victor Hess returns from a 1912 balloon flight that reached an altitude of 5.3 kilometers.

From Textbooks • Oct. 13, 2016

Cosmic-ray research balloons are not powered; they are set free to drift with the wind.

From The Flying Saucers are Real by Keyhoe, Donald E. (Donald Edward)