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acorn tube

noun Electronics.

a vacuum tube, resembling an acorn in size and shape, used chiefly in ultrahigh-frequency electronic devices.

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Nearby words

acorn chair, acorn clock, acorn spoon, acorn squash, acorn sugar, acorn tube, acorn valve, acorn worm, acosta's disease, acotyledon, acouasm

Origin of acorn tube

First recorded in 1930–35

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019