cosmic ray

Definition from Wiktionary, the free dictionary
Jump to: navigation, search

English[edit]

Wikipedia has an article on:

Wikipedia

Noun[edit]

cosmic ray (plural cosmic rays)

  1. An energetic particle originating outside our solar system.
  2. Cosmic radiation: a stream of cosmic rays.

Usage notes[edit]

The use of the words "ray" and "radiation" implies incorrectly that cosmic rays are electromagnetic waves, similar to light rays and X-rays; cosmic rays were so named before their nature was known.

Translations[edit]