WordReference Random House Unabridged Dictionary of American English © 2026
an•ti•par•al•lel
(an′tē par′ə lel′, an′tī-),USA pronunciation adj. [Math, Physics.]
- Mathematics(of two vectors) pointing in opposite directions.
- anti- + parallel 1650–60
'antiparallel' also found in these entries (note: many are not synonyms or translations):