Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun acorn_tube

1 sense of acorn tube

Sense 1
acorn tube -- (a small vacuum tube; used at high frequencies)
       => tube, vacuum tube, thermionic vacuum tube, thermionic tube, electron tube, thermionic valve -- (electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope)