What is "anacamptic"

Anacamptic \An`a*camp"tic\, a. [Gr. ? to bend back; ? back + ? to bend.] Reflecting of reflected; as, an anacamptic sound (and echo).

Note: The word was formerly applied to that part of optics which treats of reflection; the same as what is now called catoptric. See Catoptrics.

a. reflect or reflected.