Main Entry: or·thog·o·nal

Pronunciation: \ȯr-ˈthäg-ən-^əl\

Function: adjective

1 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>
2 : statistically independent <mental ability may be classified into several orthogonal…factors—O. D. Duncan>