D defs.my
Entry 1 sense Webster, 1913

Tonophant

/(tōn"ō̇*fant)/ · Ton·o·phant · IPA
01 n. A modification of the kaleidophon, for showing composition of acoustic vibrations. It consists of two thin slips of steel welded together, …
  1. 1.
    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.(Physics.)