Meanings
Synonyms & antonyms
nounA kind of vacuum tube with a glass cap at one end.
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Origin
From the resemblance of the glass cap to the cup of an acorn.
Full word history & related roots →Cite this entry
APA
acorn tube. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/acorn%20tube
MLA
“acorn tube.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/acorn%20tube. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “acorn tube,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/acorn%20tube.
Source: acorn tube on Wiktionary, CC BY-SA 4.0.