acorn tube

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Definitions from WordNet

Noun acorn tube has 1 sense

acorn tube - a small vacuum tube; used at high frequencies
--₁ is a kind of tube, vacuum tube, thermionic vacuum tube, thermionic tube, electron tube, thermionic valve

Definitions from the Web

Acorn Tube

Noun: An electronic vacuum tube with a distinctive shape resembling that of an acorn.

Sense 1: In electronics, an acorn tube refers to a type of vacuum tube that was commonly used in early radio and television sets.

Example sentence: The vintage radio enthusiast collects acorn tubes to restore antique radios to their original working condition.

Sense 2: In botany, an acorn tube is the protective outer shell of an acorn.

Example sentence: Squirrels diligently bury acorn tubes to store them for winter food.

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