member

Concise Oxford English Dictionary © 2008 Oxford University Press:
member/ˈmembə(r)/

▶noun

• 1 a person, country, or organization that has joined a group, society, or team.

  ■ a person, animal, or plant that belongs to a particular group.

  ■ (Member) a person formally elected to certain legislative bodies.

  ■ used in the title awarded to a person admitted to certain honours.

• 2 a constituent piece of a complex structure.

  ■ a part of a sentence, equation, etc.

• 3 archaic a part of the body, especially a limb.

  ■ (also male member) a man's penis.

– derivatives
-membered adjective (chiefly Chemistry).

– origin ME: via OFr. from L. membrum ‘limb’.