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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 in·fra·son·ic /ˌɪnfrəˈsɑnɪk, (ˌ)frɑ-/
 低聲納

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

 in·fra·son·ic /-ˈsɑnɪk/ 形容詞
 聽域下的

From: WordNet (r) 2.0

 infrasonic
      adj : having frequencies below those of audible sound