antiparallel

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

adjective Mathematics, Physics.

(of two vectors) pointing in opposite directions.

Origin of antiparallel

First recorded in 1650–60; anti- + parallel

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British Dictionary definitions for antiparallel

antiparallel

adjective

physics parallel but pointing in the opposite direction

maths (of vectors) parallel but having opposite directions

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012