member

noun:a person who belongs to a group, organization, club, or team
- She became a member of the local hiking club last spring.
noun:a limb or part of the human or animal body, such as an arm or leg
- The surgeon examined the patient's injured member before proceeding with the operation.
noun:an individual element of a set or collection, especially in mathematics or logic
- In the set {2, 4, 6, 8}, each number is a member of the set.
noun:a constituent part of a complex structure, especially a component of a load-bearing structure
- The steel beam is a crucial structural member of the bridge.