INDICATRIX

In`di*ca"trix, n. Etym: [NL.] (Geom. of Three Dimensions)

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

17 June 2024

SCOPOLAMINE

(noun) an alkaloid with anticholinergic effects that is used as a sedative and to treat nausea and to dilate the pupils in ophthalmic procedures; “transdermal scopolamine is used to treat motion sickness”; “someone sedated with scopolamine has difficulty lying”


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