Brachium (plural brachia) may refer to: The arm or the upper arm The traditional name of the star Sigma Librae Brachium of inferior colliculus, part of the brain Brachium of superior colliculus, part of the brain Brachia conjunctiva, part of the brain See also Antebrachium, the forearm Parabrachial area Medial parabrachial nucleus Lateral parabrachial nucleus