What does anaclastic mean?
The definition of anaclastic
An`a*clas”tic, a.
Etym: [Gr.

1 (Opt.)
Produced by the refraction of light, as seen through water; as, anaclastic curves.
2 Springing back, as the bottom of an anaclastic glass. 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.