lithomarge

[Gr. lithos =a stone, and perhaps Lat. marg a =marl, or Old Ger. maergel =marl. Ste i no marg a was a name used by old German miners for clays which did not occur in beds, but inclosed in rocks like marrow in bones, hence Ger. Stein mark =stone-marrow.] Min.: E entially a hydrated silicate of alumina, included by Dana as a compact form of Kaolinite (q. v.). The name appears, however, to have been applied to several compact minerals of varied com position. Des Cloizeaux places it under the heading of " products of alteration or mixtures." The Brit. Mus. Cat . groups it with Hall oys i to (q. v.). 11th-on-thrip'-tic, *lith-on-trip-tic, a. & s. [Greek lithos a stone, and thrypto =to break, to wear; tribo =to rub, to grind.] A. As adj .: Having the quality or property of destroying stone in the bladder or kidneys. B. As subst.: A medicine or preparation having the quality of destroying stone in the bladder or kidneys. 11th-on-trip-tist, s. [Greek lithos = a stone; thrypto =to break, and Eng. suff. -ist .] The same as LITHOTRIPTIST (q.v.). *11th-on-trip-tōr, s. [Gr. lithos a stone, and thrypto to break; suff. or.] An instrument for crushing a stone in the bladder into minute fragments, which may pa out with the urine. 2543