The Collaborative International Dictionary of English v.0.48:

Anticline \An"ti*cline\, n. [See Anticlinal.] (Geol.)
   A structure of bedded rocks in which the beds on both sides
   of an axis or axial plane dip away from the axis; an
   anticlinal. Contrassted with syncline.
   [Webster 1913 Suppl.]