• synonyms

acorn tube

See more synonyms for acorn tube on Thesaurus.com
noun Electronics.
  1. a vacuum tube, resembling an acorn in size and shape, used chiefly in ultrahigh-frequency electronic devices.
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Origin of acorn tube

First recorded in 1930–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018