1) An armlike part or process 2) Branch 3) Fork 4) Ramification 1) Arm 2) Humerus 
Brachium can refer to: == See also == ...
• (n.) The upper arm; the segment of the fore limb between the shoulder and the elbow.
(bra´ke-әm) pl. bra´chia Latin word meaning arm;; it is a term used in anatomy and refers only to the part of the arm between the shoulder and the elbow.
Brach'i·um noun ; plural Bracchia [ Latin brachium or bracchium , arm.] (Anat.) The upper arm; the segment of the fore limb between the shoulder and the elbow. 
Type: Term Pronunciation: brā′kē-ŭm, brak′ē; -ă Definitions: 1. An anatomic structure resembling an arm. Synonyms: arm1
[n] - (biology) a branching or armlike part of an animal
The upper (proximal) portion of the forelimb (wing); it contains the humerus.
noun (biology) a branching or armlike part of an animal
Latin = arm, adjective - brachial.
the part of the arm from the shoulder to the elbow. · the corresponding part of any limb, as in the wing of a bird. · an armlike part or process.