automaton [aw-tom-uh-ton] noun
1. a mechanical figure or contrivance constructed to act as if by its own motive power; robot.
2. a person or animal that acts in a monotonous, routine manner, without active intelligence.
3. something capable of acting automatically without a motive power.
EX. The automaton "Big Daddy" is a responsible and attentive guardian for children but does not like to share.