a. and sb. rare.
† 1. Parallel, but opposed or contrary. Obs.
a. 1660. Hammond, Serm. (1675), xiii. 197 (T.). To take the opposite course to them, and to provide our remedy antiparallel to their disease.
2. Geom. Antiparallel lines or Antiparallels: two lines that make with two other lines angles equal each to each, but contrary ways, one being exterior and the other interior.
1796. Hutton, Math. Dict., I. 122.
