Dictionary.com
definitions
  • synonyms

positive ray

noun Physics.
  1. a stream of positive ions traveling from a metallic anode to the cathode in a gas-discharge tube.
Show More

Origin of positive ray

First recorded in 1900–05
Also called anode ray, canal ray.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018