adj \r-ˈthäg-ən-əl\

Definition of ORTHOGONAL

a : lying or intersecting at right angles b : being, using, or made with three ECG leads whose axes are perpendicular to each other and to the frontal, horizontal, and sagittal axes of the body <the three orthogonal leads were recorded simultaneously on magnetic tape—Massoud Nemati et al>
: statistically independent <mental ability may be classified into several orthogonal…factors—O. D. Duncan>

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