An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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osculating plane
  هامُنِ آبوسنده  
hâmon-e âbusandé
Fr.: plan osculateur  

For a curve C at a point p, the limiting plane obtained from taking planes through the tangent to C at p and containing some variable point p’ and then letting p’ approach p along C.

See also: → osculating; → plane.