Definitions for hairspringˈhɛərˌsprɪŋ
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Random House Webster's College Dictionary
hair•springˈhɛərˌsprɪŋ(n.)
a fine, usu. spiral, spring used for oscillating the balance of a timepiece.
Category: Horology
Origin of hairspring:
1820–30
Princeton's WordNet
hairspring(noun)
a fine spiral spring that regulates the movement of the balance wheel in a timepiece
Wiktionary
hairspring(Noun)
A spring, made of a coil of fine wire, that is used to regulate the movement of a balance wheel in a watch.
Webster Dictionary
Hairspring(noun)
the slender recoil spring which regulates the motion of the balance in a timepiece
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