COSMIC RAY

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

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

Classified under:

Nouns denoting natural phenomena

Hypernyms ("cosmic ray" is a kind of...):

ionizing radiation (high-energy radiation capable of producing ionization in substances through which it passes)

Holonyms ("cosmic ray" is a part of...):

cosmic radiation (radiation coming from outside the solar system)

Credits