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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 otacoustic
 助聽的

From: Webster's Revised Unabridged Dictionary (1913)

 ot·a·cous·tic a.  Assisting the sense of hearing; as, an otacoustic instrument.
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From: Webster's Revised Unabridged Dictionary (1913)

 ot·a·cous·tic ot·a·cous·ti·con n. An instrument to facilitate hearing, as an ear trumpet.
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