WordReference Random House Unabridged Dictionary of American English © 2026
vis′ible speech′, [Phonet.]
- Phoneticsthe representation in graphic or pictorial form of characteristics of speech, as by means of sound spectrograms.
- Phoneticsthe system of handwritten phonetic symbols invented by Melville Bell in 1867 to provide a visually comprehensible rendition of speech sounds.
- 1850–55