1. The arm, especially the upper arm from shoulder to elbow; used chiefly in anatomy and medical contexts.
Usage: formal; anatomical; Latin-derived term
2. A limb or arm-like appendage of an organism, especially in zoology.
Usage: technical; zoological

Examples

• The brachium is the region of the arm between the shoulder and the elbow.
• In anatomical terminology, the brachium refers to the upper arm bone and surrounding structures.
• The doctor examined the patient's brachium for signs of injury.
• Starfish possess multiple brachia that allow them to move and capture food.
• The brachium of the octopus is lined with suckers for gripping objects.