Hairspring

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Hairspring \Hair"spring`\ (-spr[i^]ng`), n. (Horology)
     The slender recoil spring which regulates the motion of the
     balance in a timepiece.
     [1913 Webster]

From WordNet (r) 2.0 [wn]:



  hairspring
       n : a fine spiral spring that regulates the movement of the
           balance wheel in a timepiece