A subordinate or subsidiary part or organ; an external organ or limb, esp. of the articulates.

A secondary part or a projecting part.

a natural prolongation or projection from a part of an organism either animal or plant; "a bony process"

limb (arm, leg or wing).

any part, piece or organ attached by a joint to the body or to any other main structure

an organ or part that is attached to the trunk of an organism

a volumetric attachment to a structure, e

a body part branching off from the trunk; for example, an arm or leg.

Something appended to, or accompanying, a principal or greater thing, though not necessary to it, as a portico to a house.

a part that is joined to something larger

Something attached to something more important, like an arm or leg BEHAVIOR The way a living thing acts

An appendage in the broadest sense is an additional or subsidiary part existing on, or added to, something which can generally still function if the appendage has never existed or is later provided or grown, or will still perform a primary function if the appendage is removed.