thermionic valve

therm·i·on valve

T t

Definitions of thermionic valve words

noun thermionic valve vacuum tube. 1
noun thermionic valve an electronic valve in which electrons are emitted from a heated rather than a cold cathode 0

before 1915

One of the 14% newest English words

First recorded in 1915-20

noun

adjective

verb

adverb

pronoun

preposition

conjunction

determiner

exclamation

This term is known only to a narrow circle of people with rare knowledge. Only 1% of English native speakers know the meaning of this word.

According to our data most of word are more popular. This word is almost not used. It has a much more popular synonym.

This diagram is provided by Google Ngram Viewer

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