The Collaborative International Dictionary of English v.0.48:

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

The Collaborative International Dictionary of English v.0.48:

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]