Lenard ray (English, noun)
expansion: Lenard ray (plural Lenard rays)
Senses:
glosses: One of the rays that emanate from the outer surface of a plate composed of any material permeable by cathode rays, such as aluminium, which forms a portion of a wall of a vacuum tube, or which is mounted within the tube and exposed to radiation from the cathode.
tags: dated
Forms:
form: Lenard rays
tags: plural