The Collaborative International Dictionary of English v.0.48:

machinelike \machinelike\, machine-like \machine-like\adj.
   behaving in an unthinking manner, like the functioning of a
   machine; as, machine-like fools.

   Syn: automatic, automaton-like, automatonlike, machinelike,
        robotlike.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

machinelike
    adj 1: resembling the unthinking functioning of a machine; "an
           automatic `thank you'"; "machinelike efficiency" [syn:
           automatic, automatonlike, machinelike, robotlike,
           robotic]