member

noun

1. one of the persons who compose a social group (especially individuals who have joined and participate in a group organization)"only members will be admitted"
2. anything that belongs to a set or class"snakes are members of the class Reptilia"
3. an external body part that projects from the body"it is important to keep the extremities warm"
4. an organization that is a member of another organization (especially a state that belongs to a group of nations)"the library was a member of the interlibrary loan association"
5. the male sex organ