Bible Dictionaries
Otacoustic

Webster's Dictionary

(1):

(n.) Alt. of Otacousticon

(2):

(a.) Assisting the sense of hearing; as, an otacoustic instrument.

Bibliography Information
Webster, Noah. Entry for 'Otacoustic'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​o/otacoustic.html. 1828.