a surface to which rays reflected or refracted by another surface are tangents

English - English

Definition of a surface to which rays reflected or refracted by another surface are tangents in English English dictionary

caustic surface

Caustic curves and surfaces are called catacaustic when formed by reflection, and diacaustic when formed by refraction.

Hyphenation

a sur·face to which rays reflected or refracted by an·oth·er sur·face are tangents