Di`a*caus"tic, n. 1. (Med.) 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. (Math.) A curved formed by the consecutive intersections of rays of light refracted through a lens.
Di*ach"y*lum(?), } n. [NL. diachylum, fr. Gr. very juicy; dia` thoroughly + juice.] (Med. & Chem.) A plaster originally composed of the juices of several plants (whence its name), but now made of an oxide of lead and oil, and consisting essentially of glycerin mixed with lead salts of the fat acids.
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Sun 09th December 2018