- serial, in series, nonparallel - of or relating to the sequential performance of multiple operations; "serial processing"
Antonyms: synchronous, synchronal, synchronic (indirect, via asynchronous)
- nonparallel - (of e.g. lines or paths) not parallel; converging
Antonym: parallel (indirect, via perpendicular, oblique)
Antonym: perpendicular (indirect, via oblique, parallel)