ki·ne·sics (kə-nē'sĭks, -zĭks, kī-) n.
(used with a sing. verb) The study of nonlinguistic bodily movements, such as gestures and facial expressions, as a systematic mode of communication.
[From Greek kīnēsis, movement; see kinesis.] ki·ne'sic (-sĭk, -zĭk) adj.