Bi′o‐pho″to‐phone (?), n. [Gr. βίοσ life + photo + φωνή sound, voice.] An instrument combining a cinematograph and a phonograph so that the moving figures on the screen are accompanied by the appropriate sounds.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.