Definitions for "Automatic winding"
Keywords:  rotor, mainspring, wearer, wound, worn
A mechanically powered watch that is wound by the motion of the wearer's arm rather than through turning the winding stem (manual mechanical). In response to this motion, a rotor turns and winds the watch's mainspring. If an automatic watch is not worn for a day or two, it will run down and need to be wound by hand to get it started again.
A rotating weight (rotor) which is set into motion by the arm of the wearer. The motion causes this weight to wind the main-spring barrel in a mechanical watch, thereby keeping the watch wound when worn on the wrist. Automatic winding can occur uni-directionally (meaning the weight only winds the watch in one direction) or bi-directional winding (meaning the rotor will wind the watch regardless of which direction it spins).
(also called "self-winding") Winding that occurs through the motion of the wearer's arm rather than through turning the winding stem. It works by means of a rotor that turns in response to motion, thereby winding up the watch's mainspring. An automatic watch that is not worn for a day or two will wind down and need to be wound by hand to get it started again.