Meaning of visible speech

vis'ible speech'

Pronunciation: [key]
— Phonet. Phonet.
  1. the representation in graphic or pictorial form of characteristics of speech, as by means of sound spectrograms.
  2. the system of handwritten phonetic symbols invented by Melville Bell in 1867 to provide a visually comprehensible rendition of speech sounds.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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