Century Dictionary and Cyclopedia
- n. A device for increasing the loudness of the sounds produced by a phonograph. See the extract.
- n. historical A pneumatic type of sound-playback device used in the early part of the twentieth century.
GNU Webster's 1913
- n. obsolescent A pneumatic reproducer for a phonograph, controlled by the recording stylus on the principle of the relay. It produces much clearer and louder tones than does the ordinary vibrating disk reproducer.
- Formed from Ancient Greek αὐξητός (auksētos, "that can be increased") + φωνή (phōnē, "sound"). (Wiktionary)
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