Bible Dictionaries
Tonophant
Webster's Dictionary
(n.) A modification of the kaleidophon, for showing composition of acoustic vibrations. It consists of two thin slips of steel welded together, their length being adjystable by a screw socket.
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Bibliography Information
Webster, Noah. Entry for 'Tonophant'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/t/tonophant.html. 1828.