piston piston /ˈpɪstən/

noun

1. Mechanical device that has a plunging or thrusting motion  ( piston , plunger )
   mechanical device that has a plunging or thrusting motion
   
   

 Piston

1. United States neoclassical composer (1894-1976)  ( Piston , Walter Piston )
   United States neoclassical composer (1894-1976)