Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for piston from the 1913 edition of Webster's Revised Unabridged Dictionary. Define piston using one of the most comprehensive free online dictionaries on the web.

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piston
Part of Speech: noun
Results: 1
1. 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.
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