spring loaded
/sprɪŋˈloʊdɪd/
adjective
- Containing a spring that is compressed or stretched to store energy, so that the device can move or release something when activated.
- The spring-loaded trap snapped shut when the mouse touched the bait.
- He used a spring-loaded punch to quickly make a hole in the leather.
- The cabinet door has a spring-loaded hinge that closes it automatically.