(slang) A stiff arm resulting from a long session of CB radio operation.

(slang) A person's arm that has scarred and hardened from the repeated injection of recreational drugs.

(military, slang, chiefly in the plural) Any branch of the military that engages in direct combat.

(cycling) One of the two lever components that attach the bottom bracket spindle to a pedal.

The part of a lever between the load and the fulcrum.

plural of arm-chest

(historical, nautical) A portable chest for storing weapons or tools on a ship.

A firearm designed to be carried and fired by a single person, and often held in the hand.

(mechanical engineering) A radius rod.

plural of arm garter