air ring
noun
: an inflatable rubber ring used as a cushion to relieve pressure on prominent bony points (as in helping to prevent bedsores)
Word History
First Known Use
1895, in the meaning defined above
- planers
- planes
- planeshear
- planeside
- planesman
- planesmen
- planest
- planet
- planet differential
- planet gear
- planet wheel
- planet-stricken
- planet-struck
- planetal
- planetaria
- planetarian
- planetaries
- planetarily
- planetarium
- planetariums
- planetary
- planetary configuration
- planetary electron
- planetary gear
- planetary gearing