headspring
/ˈhɛdˌsprɪŋ/Definitions
1. noun
The initial upward movement of a spring or a coiled object that stores energy, typically in the form of a metal or a mechanical device.
“The diver’s headspring allowed her to jump up to 5 feet out of the water.”
2. noun
The spring or source of a river or stream, especially at its head or origin.
“The headspring of the river provided a natural swimming area.”
3. noun
A part of a mechanical device that stores energy, typically in the form of a spring or coiled wire.
“The engineer explained the function of the headspring in the clock mechanism.”