Definition of hairspring in English:

hairspring

noun

  • A slender flat coiled spring regulating the movement of the balance wheel in a watch.

    • ‘When the spring is released current ceases to flow in the coil allowing the hairspring to return the balance.’
    • ‘In most cases they used a long extension of the hairspring and pinned it to the base of the balance cock.’
    • ‘The curb pins on the regulator must be adjusted so that the hairspring hits them when it is supposed to.’
    • ‘The two hairsprings are offset at 180 degrees to provide optimal balance, better regulation, easy adjustment, improved stability and greater precision.’
    • ‘This oscillation is not exactly a parallel to the balance wheel and hairspring of a clockwork watch, but the fact is that both use oscillations to keep track of passing time.’

Pronunciation:

hairspring

/ˈherˌspriNG/