inverted pendulum
noun
A pendulum fixed at the base and with its upper end free; specifically a vertical rod having a heavy weight at its upper end and resting on a bearing at the other, held in position by springs which allow it to oscillate in a vertical plane.
Origin
Late 18th century; earliest use found in Thomas Hatton (fl. 1757–1774).
- flightseeing
- flight sergeant
- flight simulator
- flight suit
- flight surgeon
- flight test
- flightworthy
- flighty
- flimflam
- flimflammer
- flimflammery
- flimsily
- flimsiness
- flimsy
- flinch
- flincher
- flinching
- flinchingly
- flinders
- Flinders bar
- Flinders Island
- Flinders, Matthew
- fling
- flinger
- fling (or throw) one's cap over the windmill(s)