lag screw

1 of 2

noun

: a screw having a wrench head and woodscrew threads terminating in a point

called also lag bolt

lag-screw

2 of 2

transitive verb

: to fasten or join with a lag screw

Word History

Etymology

Noun

lag entry 6; from its original use in securing lags to drums or cylinders

Transitive verb

lag screw

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