An`a*clas"tic (?), a. [Gr. ? to bend back
and break; to reflect (light); ? + ? to break.] 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.