-catadioptrics-

n. The science which treats of catadioptric phenomena, or of the used of catadioptric instruments. [ 1913 Webster ]

{ } a. [ Pref. cata + dioptric: cf. F. catadioptrique. ] (Physics) Pertaining to, produced by, or involving, both the reflection and refraction of light; as, a catadioptric light. Hutton. [ 1913 Webster ]