Wordnet 3.0
ADJECTIVE (1)
1. 
 resembling the unthinking functioning of a machine; 
- Example: "an automatic `thank you'"- Example: "machinelike efficiency"[syn: automatic, automatonlike, machinelike, robotlike, robotic]
WordNet (r) 3.0 (2006):
automatonlike
    adj 1: resembling the unthinking functioning of a machine; "an
           automatic `thank you'"; "machinelike efficiency" [syn:
           automatic, automatonlike, machinelike, robotlike,
           robotic]