positive ray

noun Physics.

a stream of positive ions traveling from a metallic anode to the cathode in a gas-discharge tube.

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Nearby words

positive feedback, positive ion, positive law, positive organ, positive polarity, positive ray, positive scotoma, positive stain, positive theology, positive vetting, positive-negative pressure breathing

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. 2019