Submitted by György Chityil ... on Fri, 01/19/2018 - 22:09 Hierarchy: NounDescription: {{context|now|_|rare}} An instrument to aid hearing, such as an ear trumpet or hearing aid.Ngram: otacousticonNgram Text: otacousticonSource: WiktionaryIssue: 0Wiktionary tag: nowrareNgram Count: 1