- Tonophant Ton"o*phant (t[=o]n"[-o]*fant), n. [Gr. to`nos a tone + fai`nein to show.] (Physics.) A modification of the kaleidophon, for showing composition of acoustic vibrations. It consists of two thin slips of steel welded together, their length being adjustable by a screw socket. [1913 Webster]
The Collaborative International Dictionary of English. 2000.