a. [ Gr. &unr_; to bend back and break; to reflect (light); &unr_; + &unr_; to break. ] 1. (Opt.) Produced by the refraction of light, as seen through water; as, anaclastic curves. [ 1913 Webster ]

2. Springing back, as the bottom of an anaclastic glass. [ 1913 Webster ]

Anaclastic glass, a glass or phial, shaped like an inverted funnel, and with a very thin convex bottom. By sucking out a little air, the bottom springs into a concave form with a smart crack; and by breathing or blowing gently into the orifice, the bottom, with a like noise, springs into its former convex form. [ 1913 Webster ]

n. (Opt.) That part of optics which treats of the refraction of light; -- commonly called dioptrics. Encyc. Brit. [ 1913 Webster ]

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 ]

a. [ See Auto-; Clastic. ] (Geol.) Broken in place; -- said of rocks having a broken or brecciated structure due to crushing, in contrast to those of brecciated materials brought from a distance. [ Webster 1913 Suppl. ]

a. [ Gr. &unr_; br&unr_;, fr. &unr_; to break. ] 1. Pertaining to what may be taken apart; as, clastic anatomy (of models). [ 1913 Webster ]

2. (Min.) Fragmental; made up of brok&unr_; fragments; as, sandstone is a clastic rock. [ 1913 Webster ]

a. Of or pertaining to the iconoclasts, or to image breaking. Milman.

a. (Crystallog.) Breaking in directions at right angles to each other; -- said of the monoclinic feldspars. [ 1913 Webster ]

a. [ Pref. syn- + Gr. kla^n to break. ] (Math. Physics) Curved toward the same side in all directions; -- said of surfaces which in all directions around any point bend away from a tangent plane toward the same side, as the surface of a sphere; -- opposed to anticlastic. Sir W. Thomson. [ 1913 Webster ]