The Collaborative International Dictionary
Anaclastics
Anaclastics \An`a*clas"tics\, n. (Opt.)
That part of optics which treats of the refraction of light;
-- commonly called dioptrics.
--Encyc. Brit.
[1913 Webster] ||
Wiktionary
anaclastics
n. The part of optics that deals with the refraction of light.