Diabrosis

( Med.) Same as EROSION, q. v. Diacatholicon, n. [Gr. dia, and katholikos, universal.] ( Med.) A kind of purge, so called from its supposed general usefulne . Diacaus'tic, a. [From Gr. dia, and kaie in, to burn.] (Geom.) See CAUSTIC. -n. (Geom.) A curve, to which the rays of light, i uing from a luminous point, and refracted by another curve, are tangents. ( Med .) That which is caustic by refraction, as a double convex lens, which has been sometimes used for cauterizing an ulcer, by directing the sun's rays upon it. Diach'ylon, Diachylum, ( di - ake - lün ,) n. [Gr., succulent.) ( Med . ) The name sometimes given to the adhesive plaster, both spread and unspread; though the term strictly belongs to the litharge plaster ( emplastrum lithargyri , or plumb i ). It is used occasionally as a discutient dre ing, but most frequently employed to make, when mixed with resin, the common sticking or adhesive plaster. Diac'lasite, n. ( Min. ) An orthorhombic mineral, much