otacousticon

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الإنجليزية - الإنجليزية
An instrument to aid hearing, such as an ear trumpet or hearing aid

Gyges' invisible ring, or some rare perspective glass, or otacousticon, which would so multiply species that a man might hear and see all at once .

An instrument to facilitate hearing, as an ear trumpet
otacousticon

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    () From combining form of Ancient Greek οὖς (“ear”) + ἀκουστικόν, neuter of ἀκουστικός (“acoustic”).
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