Dī'a-caus'tic1, a.
a. [Gr. διακαίειν, to burn through, to heat to excess, from διά, through, and καίειν, to burn.] Belonging to a species of caustic curves formed by refraction. See CAUSTICS.
2 entries under this word
Diacaustic
Dī'a-caus'tic2, n.
n. 1. (Med.) That which is caustic by refraction, as the sun's rays concentrated by a convex lens, sometimes used as a cautery. Dunglison.
Sense 2. (Math.) A curve formed by the consecutive intersections of rays of light refracted through a lens.