antiparallel

[ an-tee-par-uh-lel, an-tahy- ]

adjective

, Mathematics, Physics.

1. (of two vectors) pointing in opposite directions.

antiparallel

/ ˌæntɪˈpærəˌlɛl /

adjective

1. physics parallel but pointing in the opposite direction
2. maths (of vectors) parallel but having opposite directions

Word History and Origins

Origin of antiparallel¹

First recorded in 1650–60; anti- + parallel