acorn tube

1. 1.

   a small vacuum tube; used at high frequencies

   Broadertube

Questions about acorn tube

What does acorn tube mean?

acorn tube means "a small vacuum tube; used at high frequencies".

Is acorn tube a common word?

acorn tube is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.