Found 2 items, similar to hairspring.
English → English (WordNet) Definition: hairspring hairspring n : a fine spiral spring that regulates the movement of the balance wheel in a timepiece
English → English (gcide) Definition: Hairspring Hairspring \Hair"spring`\ (-spr[i^]ng`), n. (Horology) The slender recoil spring which regulates the motion of the balance in a timepiece. [1913 Webster]