hairspring

noun
hair·​spring | \ ˈher-ˌspriŋ How to pronounce hairspring (audio) \

Definition of hairspring

: a slender spiraled recoil spring that regulates the motion of the balance wheel of a timepiece

First Known Use of hairspring

1830, in the meaning defined above

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The first known use of hairspring was in 1830

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Cite this Entry

“Hairspring.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hairspring. Accessed 28 May. 2020.

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