hairspring

2 definitions found

hairspring - Collaborative International Dictionary of English v.0.48 :

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

hairspring - WordNet (r) 2.1 (2005) :

  hairspring
      n 1: a fine spiral spring that regulates the movement of the
           balance wheel in a timepiece