phanotron

[ fan-uh-tron ]
/ ˈfæn əˌtrɒn /

noun Electronics.

a hot-cathode gas diode.

Origin of phanotron

1930–35; perhaps < Greek phan(ázein) to appear + -o- -o- + -tron
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019