Brachium

Brachium can refer to:
 * Arm, specifically the upper arm (aka aftarm) with the term antebrachium existing to describe forearm
 * The proper name of the star Sigma Librae
 * Brachium of inferior colliculus
 * Brachium of superior colliculus
 * Brachium of the male Lepidoptera genitalia
 * Brachia conjunctiva (superior cerebellar peduncles)