aluminum

(^-loo'mif-num) white silvery metal of very light weight; symbol Al, atomic weight 27.1. a. group, five of the basylous dements, glucinum, aluminum, scandium, gallium, and indium, alu'mini hydrox'idum (U.S.), hydrated alumina, aluminum hydrate, a light white powder employed as an astringent dusting powder, and internally as a mild astringent antacid in doses of gr. 3-6 (0.2-0.4). alu'- minum naphtholdisul'phonate, aluminol. alu'- mini sulphas (N.P.), aluminum sulphate, a. white crystalline ma or powder; employed as a caustic astringent in pencils.