You searched for: “pantelephone”
pantelephone (s) (noun), pantelephones (pl)
A highly sensitive microphone capable of reproducing minute or very small sound-vibrations at great distances.
This entry is located in the following units: pan-, panto-, pant- (page 4) phon-, phono-, -phone, -phonia, -phonic, -phonetic, -phonous, -phonically, -phonetically, -phony + (page 10)