What's the adjective for parallelling? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs parallel, parallelize and parallelise which may be used as adjectives within certain contexts.
“Our duty is seconded with such an advantage, as is not parallelable in all the world beside.”
“Dayton, Ohio, has introduced their new parallelable TreStar P line of online double-conversion three-phase Uninterruptible Power Supplies for critical loads.”