diagonial Meaning, Definition & Usage

Di`a*go"ni*al adjective
Definitions
  1. Diagonal; diametrical; hence; diametrically opposed. Obs.
    Sin can have no tenure by law at all, but is rather an eternal outlaw, and in hostility with law past all atonement; both diagonal contraries, as much allowing one another as day and night together in one hemisphere. Milton.

Webster 1913