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

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now