(military) The position of a weapon carried diagonally in front of the body.

(astronomy) A section of a spiral galaxy that coils out from the centre.

plural of spiral arm

(UK, Navy) A warrant officer or chief petty officer responsible for discipline aboard a naval ship.

plural of master-at-arms

simple past tense and past participle of arm to the teeth

plural of arms race

plural of arming sword

An arm connected to the output shaft of a steering gear, aimed at moving the steering linkage to steer a vehicle's front wheels

plural of arms bearer