Cockroach, or Blatta, L, a genus of insects, resembling the beetle, and consisting often species, the most remarkable of which is the orientalis, or eastern cockroach! These insects are frequently found in America; they penetrate chests, drawers, etc. and do considerable injury to clothes. They seldom appear till night, when they infest beds, and bite very severely, leaving an unpleasant smell. Their food is bread, meat, whether raw or dressed, linen, books, silk-worms, and their cods, etc. - According to Mr Hans Sloane, the Indians mix the ashes of the cockroach with sugar, and apply them to ulcers, in order to promote their suppuration.