51Թ

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binormal

[ bahy-nawr-muhl, bahy-nawr- ]

noun

Geometry.
  1. the normal to a curve, lying perpendicular to the osculating plane at a given point on the curve.


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51Թ History and Origins

Origin of binormal1

First recorded in 1840–50; bi- 1 + normal
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Example Sentences

Examples have not been reviewed.

The normal perpendicular to the osculating plane is called the binormal.

From

A tangent, principal normal, and binormal are a convenient set of rectangular axes to use as those of reference, when the nature of a curve near a point on it is to be discussed.

From

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