polyacoustic
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Polyacoustic — Pol y*a*cous tic, a. [Poly + acoustic: cf. F. polyacoustique.] Multiplying or magnifying sound. n. A polyacoustic instrument. [1913 Webster] … The Collaborative International Dictionary of English
polyacoustic — 1. adjective Multiplying or magnifying sound. 2. noun A polyacoustic instrument … Wiktionary
