racer

noun

• 1an animal or means of transportation bred or designed especially for racing:tall-masted ocean racers
• a person who competes in races.

• 2a fast-moving, harmless, and typically slender-bodied snake.

  • Several genera in the family Colubridae: genus Coluber, including the American C. constrictor and the European C. gemonensis (see also whip snake), and the Asian genera Ptyas and Argyrogena (also called rat snake)

• 3a circular horizontal rail along which the carriage or traversing platform of a heavy gun moves.