Found 2 items, similar to Antiparallels.
English → English (WordNet) Definition: antiparallel antiparallel adj : (especially of vectors) parallel but oppositely directed; “antiparallel vectors”
English → English (gcide) Definition: Antiparallels Antiparallels \An`ti*par"al*lels\, n. pl. (Geom.) Straight lines or planes which make angles in some respect opposite in character to those made by parallel lines or planes. [1913 Webster]