cone key

noun

: any of usually three taper saddle keys fitting all round a shaft to key on it a piece (as a pulley) the hole in which is too large for the shaft

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