You searched for: “otacousticon”
otacousticon (s) (noun), otacousticons (pl)
A device that aids hearing: One kind of otacousticon is a hearing aid.
This entry is located in the following unit: acous-, acou-, acouo-, acoustico-, acouto-, acousti-, -acousia, -acousis, -acoustical, acu-, -acusis-, -acusia (page 7)