cathode ray

1. 1.

   a beam of electrons emitted by the cathode of an electrical discharge tube

   Broaderbeam

Questions about cathode ray

What does cathode ray mean?

cathode ray means "a beam of electrons emitted by the cathode of an electrical discharge tube".

Is cathode ray a common word?

cathode ray is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.