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binormal

American  
[bahy-nawr-muhl, bahy-nawr-] / ˈbaɪˌnɔr məl, baɪˈnɔr- /

noun

Geometry.

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

Etymology

Origin of binormal

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

From Project Gutenberg

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 Project Gutenberg

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.