Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of hairspring is as below...

Regulator :: Regulator (n.) A contrivance for regulating and controlling motion, as: (a) The lever or index in a watch, which controls the effective length of the hairspring, and thus regulates the vibrations of the balance. (b) The governor of a steam engine. (c) A valve for controlling the admission of steam to the steam chest, in a locomotive..

Hairspring :: Hairspring (n.) The slender recoil spring which regulates the motion of the balance in a timepiece.

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