part of a tree; a shoot axis that develops from an axillary bud meristem or from equal divisions of a meristematic apical cell

A branch is the part of a tree that grows out from the trunk of a tree. The size of a branch may vary depending on the type of tree, the location of the branch relative to the tree, and how healthy the tree is. The term twig usually refers to a terminus, while bough refers only to branches coming directly from the trunk.

A branch of a tree.