An example of a piston is the part of a car that compresses fluids and creates fluid pressure.
An example of a piston is the valve in a trumpet that changes the notes played by pushing down on one of three pistons.
Origin of piston
- French from Italian pistone, pestone large pestle from pestare to pound, crush from Late Latin pistāre frequentative of Latin pīnsere, pīnsāre
From American Heritage Dictionary of the English Language, 5th Edition
- From French piston.