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Friday, August 1st, 2025
the Week of Proper 12 / Ordinary 17
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Bible Dictionaries
Indicatrix

Webster's Dictionary

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(n.) A certain conic section supposed to be drawn in the tangent plane to any surface, and used to determine the accidents of curvature of the surface at the point of contact. The curve is similar to the intersection of the surface with a parallel to the tangent plane and indefinitely near it. It is an ellipse when the curvature is synclastic, and an hyperbola when the curvature is anticlastic.

Bibliography Information
Webster, Noah. Entry for 'Indicatrix'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​i/indicatrix.html. 1828.
 
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