meaning of diacaustic
1. Pertaining to, or possessing the properties of, a species of caustic curves formed by refraction. See Caustic surface, under Caustic.
2. That which burns by refraction, as a double convex lens, or the suns rays concentrated by such a lens, sometimes used as a cautery.
3. A curved formed by the consecutive intersections of rays of light refracted through a lens.
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