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5 definitions found

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

 fo·cal /ˈfokəl/
 (a.)焦點的,在焦點上的

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

 fo·cal /ˈfokəl/ 形容詞
 病灶的,局灶的,局部的,焦點的

From: Network Terminology

 focal
 焦點

From: Webster's Revised Unabridged Dictionary (1913)

 Fo·cal a.  Belonging to,or concerning, a focus; as, a focal point.
 Focal distance, or length, of a lens or mirror Opt., the distance of the focus from the surface of the lens or mirror, or more exactly, in the case of a lens, from its optical center. --Focal distance of a telescope, the distance of the image of an object from the object glass.
 

From: WordNet (r) 2.0

 focal
      adj 1: having or localized centrally at a focus; "focal point";
             "focal infection"
      2: of or relating to a focus; "focal length"