Akademik

brass knucks
noun
a small metal weapon; worn over the knuckles on the back of the hand
Syn: ↑knucks, ↑brass knuckles, ↑knuckles, ↑knuckle duster
Usage Domain: ↑plural, ↑plural form
Hypernyms: ↑weapon, ↑arm, ↑weapon system

* * *

noun plural but singular or plural in construction
see brass knuckles

Useful english dictionary. 2012.