Orthogonal definitions

ôr-thŏg'ə-nəl
Relating to or composed of right angles.
adjective
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Relating to or composed of right angles.
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Very different or unrelated; sharply divergent.
adjective
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Relating to a matrix whose transpose equals its inverse.
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Relating to a linear transformation that preserves the length of vectors.
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Having to do with right angles; perpendicular; rectangular.
adjective
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In mathematics, at right angles to or perpendicular to.
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In telecommunications, describing radio frequency (RF) signals that are independent and mutually exclusive and, therefore, avoid intersymbol interference.Thereby, a receiver can recognize a legitimate signal and reject an unwanted signal or signal element.The concept applies to orthogonal frequency division multiplexing (OFDM), also known as discrete multitone (DMT). See also DMT, interference, RF, signal, and symbol.
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(geometry) Of two objects, at right angles; perpendicular to each other.

A chord and the radius that bisects it are orthogonal.

adjective
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At right angles. The term is used to describe electronic signals that appear at 90 degree angles to each other. It is also widely used to describe conditions that are contradictory, or opposite, rather than in parallel or in sync with each other.
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(statistics) Statistically independent, with reference to variates.
adjective
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(software engineering) Of two or more aspects of a problem, able to be treated separately.

The content of the message should be orthogonal to the means of its delivery.

adjective
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Of two or more problems or subjects, independent of or irrelevant to each other.
adjective
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Origin of orthogonal

From Greek orthogōnios ortho- ortho- gōniā angle genu-1 in Indo-European roots