Etymologically
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regulator

This is the current revision of this entry, as edited by bogdan on 26 October 2026 at 01:53. This address is a permanent link to this version.
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Pronunciation

  • UK: /ˈɹɛɡ.jʊ.leɪ.tə/, /ˈɹɛɡ.jə.leɪ.tə/[1]
  • US: /ˈɹɛɡ.ju.leɪ.tɚ/, /ˈɹɛɡ.jə.leɪ.tɚ/[1]

Etymology

The OED takes it as borrowed from Medieval Latin regulator, used from the 14th century in British sources,[2] formed from the past participle stem of regulō (“to control, direct”) with a Latin agent suffix.[2] Etymonline, Dictionary.com and the Shorter Oxford describe it as an agent noun formed in English from regulate and -or.[3][4][5] The verb is from rēgula (“rule, straight piece of wood”),[2][3] from Proto-Indo-European *reg- (“to move in a straight line”).[3] The OED compares French régulateur (a noun from 1728), Spanish regulador and Italian regolatore.[2]

Earliest recorded meaning

A person who or thing which regulates or controls: 1648, in M. Nedham's Loyalty speakes Truth.[2][6] Etymonline dates it to the 1650s.[3]

Semantic evolution

The mechanical sense, a device that controls the speed of a machine or the flow of gas or water, is recorded from 1661 in the OED and 1702 in Etymonline.[2][3] Johnson (1755) defined it as "that part of a machine which makes the motion equable".[7] The spring or pendulum that controls the speed of a clock is recorded from 1676, and an accurate clock used to set other clocks from 1735.[2] Etymonline has the last sense from 1758.[3] In English history the regulators were members of the commission set up by James II in 1687 to influence parliamentary elections by removing officers and freemen (1688).[2][6] In America the name was taken by extralegal groups in the late 18th and 19th centuries, recorded from 1753 in the OED and 1767 in Etymonline;[2][3] Merriam-Webster names the North Carolina association of 1767–1771 that resisted official extortion.[6] The 20th century added an agency that supervises an industry (1959), a regulator gene (1960) and, in British economics, a change in tax rates between budgets (1961).[2] In Northumberland and Durham coal-mining a regulator was a doorway with sliding lattice frames that controlled the passage of air.[8] Green's Dictionary of Slang also records it as a slang word for the vagina.[9]

Timeline

  • 1648 – a person or thing that regulates.[2][6]
  • 1661 – a device controlling the speed of a machine or a flow.[2]
  • 1676 – the part controlling the speed of a clock.[2]
  • 1688 – a member of James II's commission of 1687.[2]
  • 1735 – an accurate clock for setting others.[2]
  • 1753 – a member of an extralegal group in North America.[2]
  • 1959 – an official or agency that supervises an industry.[2]
  • 1960 – a regulator gene.[2]

Meanings

Noun

  1. A person or thing that regulates or controls something.[10][6][2]
  2. An official or agency that supervises an industry or business activity: The energy regulator capped household bills.[2][5]
  3. A device that controls the flow, pressure or level of a gas, liquid, voltage or temperature, or the speed of a machine.[10][2]
  4. The mechanism, such as a hairspring and balance wheel or a pendulum, that controls the speed of a clock or watch.[10][2]
  5. An accurate clock by which other timepieces are set.[10][2]
  6. (genetics) A gene whose product controls the activity of another gene; a regulator gene.[10][2]
  7. (history) A member of the commission set up by James II in 1687 to influence the election of members of Parliament.[6][2]
  8. (history) A member of any of various extralegal bands in the United States in the late 18th and 19th centuries, especially one in North Carolina in 1767–1771.[6][2]

Word family

  • thermoregulator
  • voltage regulator

References

  1. ^ a b 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 u v w x y z Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ a b c d e f g Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
  5. ^ a b Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press
  6. ^ a b c d e f g Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  7. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
  8. ^ Wright, Joseph, ed. (1898–1905), The English Dialect Dictionary, 6 vols., Oxford: Henry Frowde; via EDD Online 4.0, University of Innsbruck (CC BY 4.0)
  9. ^ Green, Jonathon (2010), Green's Dictionary of Slang, London: Chambers; digital ed. 2016–, https://greensdictofslang.com
  10. ^ a b c d e Collins English Dictionary (2023), Glasgow: HarperCollins