noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   One of the locking lugs on a break-action firearm that extend from the bottom of the barrels under the chamber(s) and connect into the receiver bottom.
2. 2
   The metal shroud underneath the barrel of a revolver that surrounds and protects the extractor rod.

Etymology

From under- + lug.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.