audiphone

noun

au·​di·​phone

ˈȯdəˌfōn

plural -s

: an instrument consisting of a diaphragm or plate that is placed against the teeth and conveys sound vibrations to the inner ear enabling persons with certain types of deafness to hear more or less distinctly

Word History

Etymology

audi- (from Latin audire to hear) + -phone

First Known Use

1880, in the meaning defined above

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