Diacaustic
Diacaustic , adjective
[Prefix dia- + caustic.]
(Optics) Pertaining to, or possessing the properties of, a species of caustic curves formed by refraction. See Caustic surface, under Caustic.
Diacaustic , noun
1.
(Medicine) That which burns by refraction, as a double convex lens, or the sun's rays concentrated by such a lens, sometimes used as a cautery.
2.
(Mathematics) A curved formed by the consecutive intersections of rays of light refracted through a lens.