hairspring

 : 
Noun
 : 
hair=spring

WORDNET DICTIONARY

Noun hairspring has 1 sense

CIDE DICTIONARY

hairspringn. 
     The slender recoil spring which regulates the motion of the balance in a timepiece.  [1913 Webster]

OXFORD DICTIONARY

hairspring, n. a fine spring regulating the balance-wheel in a watch.


For further exploring for "hairspring" in Webster Dictionary Online


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