The Collaborative International Dictionary of English v.0.48:
10. (Zool.) Any species of small ground snakes of the family Tortricidae. [1913 Webster] Ground roller (Zool.), any one of several species of Madagascar rollers belonging to Atelornis and allied genera. They are nocturnal birds, and feed on the ground. Roller bolt, the bar in a carriage to which the traces are attached; a whiffletree. [Eng.] Roller gin, a cotton gin inn which rolls are used for separating the seeds from the fiber. Roller mill. See under Mill. Roller skate, a skate which has small wheels in the place of the metallic runner; -- designed for use in skating upon a smooth, hard surface, other than ice. [1913 Webster]