Anticlastic \An`ti*clas"tic\ ([a^]n`t[i^]*kl[a^]s"t[i^]k), a.
[Pref. anti- = Gr. kla^n to break.]
Having opposite curvatures, that is, curved longitudinally in
one direction and transversely in the opposite direction, as
the surface of a saddle.
[1913 Webster]