a strong vessel, commonly in form of an inverted bell, in which substances are pounded or rubbed with a pestle.-a short piece of ordnance, used for throwing bombs, carcasses, shells, etc., at high angles of elevation, as 45¡, and even higher; -- so named from its resemblance in shape to the utensil above described.-a building material made by mixing lime, cement, or plaster of paris, with sand, water, and sometimes other materials; -- used in masonry for joining stones, bricks, etc., also for plastering, and in other ways.-to plaster or make fast with mortar.-a chamber lamp or light.