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2 definitions found

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

 trifocal
 (a.)三焦點的三焦點透鏡,三焦點眼鏡

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

 tri·fo·cal /(ˈ)traɪˈfokəl/ 形容詞
 三焦點的,三焦距透鏡,三焦距的,有三焦距透鏡的眼鏡