fluid coupling

noun

variants or less commonly fluid flywheel

: a coupling (as a fluid drive) in which fluid (as oil) intervenes between moving members to transmit pressure and torque

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