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# orthogonal line

A straight line imagined to be behind and perpendicular to the picture plane. The orthagonals in a painting appear to converge on each other as they recede toward one or more vanishing points on the horizon. See linear perspective.

Glossary of Art Terms. 2014.

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• Orthogonal matrix — In linear algebra, an orthogonal matrix (less commonly called orthonormal matrix), is a square matrix with real entries whose columns and rows are orthogonal unit vectors (i.e., orthonormal vectors). Equivalently, a matrix Q is orthogonal if… …   Wikipedia

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• Line (heraldry) — EngrailedA chief enarched indented throughout in the arms of SawbridgeworthBretesséA fess wavy in the arms of Welwyn HatfieldNebulyA chief embattled in the arms of LetchworthIndented The lines of partition used to divide and vary fields and… …   Wikipedia

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