The Collaborative International Dictionary
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]
Wiktionary
a. not parallel
WordNet
adj. of or relating to the sequential performance of multiple operations; "serial processing" [syn: serial, in series(p)]
(of e.g. lines or paths) not parallel; converging