08572335-n 'a fixed reference point on the concave side of a conic section';
 
Czech ohnisko
汉语 焦距 , 焦点
英语 focus ( ⊳ )
日语 焦点
Definitions
日语
円錐曲線の凹面側の固定参照点
英语
a fixed reference point on the concave side of a conic section
Relations
Hypernym: point
Semantic Field: locationn
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Maintainer: Francis Bond <bond@ieee.org>