catoptrics n 1: branch of optics dealing with formation of images by mirrors
Anacamptics \An`a*camp"tics\, n. 1. The science of reflected light, now called {catoptrics}. [1913 Webster] 2. The science of reflected sounds. [1913 Webster] Anacanthini
Catoptrics \Ca*top"trics\, n. [Cf. F. catoptrique. See {Catropric}.] (Physics) That part of optics which explains the properties and phenomena of reflected light, and particularly that which is reflected from mirrors or polished bodies; -- formerly called {anacamptics}. [1913 Webster]