反射焦線
Catacaustic \Cat`a*caus"tic\, a. [Pref. cata + caustic.] (Physics) Relating to, or having the properties of, a caustic curve formed by reflection. See {Caustic}, a. --Nichol. Catacaustic \Cat`a*caus"tic\, n. (Physics) A caustic curve formed by reflection of light. --Nichol.