Anaclastic

An`a`clas´tic

a.	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.