The Collaborative International Dictionary
orthogonal orthographic rectangular right-angled
nonparallel \nonparallel\ adj.
not parallel; -- of lines or linear objects. Opposite of parallel. [Narrower terms: bias, catacorner, cata-cornered, catercorner, cater-cornered, catty-corner, catty-cornered, diagonal, kitty-corner, kitty-cornered, oblique, skew, skewed, slanted ; {crossed, decussate, intersectant, intersecting; cross-grained ; {diagonal; orthogonal, orthographic, rectangular, right-angled ; {right, perpendicular; angled ; {convergent] Also See: convergent, divergent, diverging.
(Computers) Not using parallel processing; -- of computers. [Narrower terms: serial] PJC]