(n.) A sliding piece which either is moved by or moves against, fluid pressure. It usually consists of a short cylinder fitting within a cylindrical vessel along which it moves, back and forth. It is used in steam engines to receive motion from the steam, and in pumps to transmit motion to a fluid; also for other purposes.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). piston. Retrieved September 21, 2026, from http://smartdefine.org/piston/definitions/2045897 |
| Chicago | Webster's. 2011. "piston" http://smartdefine.org/piston/definitions/2045897 (accessed September 21, 2026). |
| Harvard | Webster's 2011, piston, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/piston/definitions/2045897>. |
| MLA | Webster's. "piston" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/piston/definitions/2045897> |