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2 definitions found

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 hearing aid /-ˌed/ 名詞
 助聽器

From: WordNet (r) 2.0

 hearing aid
      n 1: an electronic device that amplifies sound and is worn to
           compensate for poor hearing [syn: deaf-aid]
      2: a conical acoustic device formerly used to direct sound to
         the ear of a hearing-impaired person [syn: ear trumpet]