German

edit

Etymology

edit

Unruh +‎ Feder

Noun

edit

Unruhfeder f (genitive Unruhfeder, plural Unruhfedern)

  1. (watches) balance spring, hairspring
    Synonym: Spiralfeder

Declension

edit

Further reading

edit
  • Unruhfeder” in Digitales Wörterbuch der deutschen Sprache