piston

Etymology

It is borrowed from French piston,^{[2][3][4][5][6][7]} a word the OED records in the mechanical sense from 1662 and Barnhart from 1648, in Pascal,^[2][4] and which in Middle French meant a pestle (1552).^[2][3][5] The French word is from Italian pistone (“stamper, pestle”) (about 1500), a variant of pestone (“large pestle, rammer”) (before 1492),^[2][4][8][7] formed from pestare (“to pound”) with the augmentative suffix -one.^[2][9][5] Hoad and the Shorter Oxford take pestone as an augmentative of pestello (“pestle”), from Latin pistillum.^[7][10] The Italian verb is from Late Latin pistō (“to pound”), a frequentative of Latin pīnsō (“to pound, crush”), whose past participle is pistus;^{[4][8][3][11]} Merriam-Webster calls the intermediate verb Medieval Latin.^[5] The OED notes an Old French peston (“pestle, stamper”) from about 1250, but finds no continuity between it and the later French piston.^[2]

Earliest recorded meaning

A disc or short cylinder on the end of a rod, fitting closely inside a tube in which it moves to and fro: 1704, in John Harris's Lexicon Technicum.^[2][3][4][5] Weekley notes that it was first used of pumps.^[11]

Semantic evolution

Johnson (1755) defined the word as "the movable part in several machines; as in pumps and syringes, whereby the suction or attraction is caused".^[12] In the 19th century it was applied to a part inside the sucker of some aquatic animals (1841), to a button on an organ that brings in a preset combination of stops (1873), and to the sliding valve of a brass instrument (1876), after the French cornet à pistons (1836).^[2] The verb, to move like a piston, is recorded from 1930, in R. Campbell's Adamastor,^[2][3] and a transitive use from 1969.^[2] In slang a piston is the penis (from 1966).^[13]

Timeline

• 1704 – a disc or cylinder moving in a tube.^[2][3][4][5]
• 1841 – zoology, a part within a sucker.^[2]
• 1873 – a button on an organ.^[2]
• 1876 – a valve in a brass instrument.^[2]
• 1930 – verb, to move like a piston.^[2][3]
• 1966 – slang, the penis.^[13]

Meanings

Noun

1. A disc or short cylinder that slides back and forth inside a closely fitting cylinder, moved by or moving against the pressure of a fluid, as in an engine or pump; in an internal-combustion engine it is driven by expanding gases and turns a crankshaft through a connecting rod.^[14][5][2]
2. (music) A sliding valve in a brass instrument that changes the pitch when pressed.^[5][2]
3. (music) A button on an organ that brings in a preset combination of stops.^[5][2]
4. (zoology) A part inside the sucker of some aquatic animals that is drawn back to create a partial vacuum.^[2]

Verb

1. To move like a piston, especially quickly and forcefully: The runner's legs pistoned up the hill.^[2][3]

Word family

• pistonlike
• piston rod
• piston ring
• trunk piston

Related words

• pestle
• pistil

References

1. ^ Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c d e f g h i j k l m n o p q r s t Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
3. ^ a b c d e f g h Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b c d e f Barnhart, Robert K. (1988), The Barnhart Dictionary of Etymology
5. ^ a b c d e f g h i Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
6. ^ Stevenson, Angus, ed. (2010), Oxford Dictionary of English, 3rd ed., Oxford: Oxford University Press
7. ^ a b c Hoad, T. F., ed. (1986), The Concise Oxford Dictionary of English Etymology, Oxford: Clarendon Press
8. ^ a b The American Heritage Dictionary of the English Language (online 2024), 5th ed., Boston: Houghton Mifflin Harcourt
9. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
10. ^ Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
11. ^ a b Weekley, Ernest (1921), An Etymological Dictionary of Modern English, London: John Murray
12. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
13. ^ a b Green, Jonathon (2010), Green's Dictionary of Slang, London: Chambers; digital ed. 2016–, https://greensdictofslang.com
14. ^ Collins English Dictionary (2023), Glasgow: HarperCollins