au·to·nom·ic 
(ô′tə-nŏmĭk)
(ô′tə-nŏmĭk)adj.
1. Physiology
a. Of, relating to, or controlled by the autonomic nervous system.
b. Occurring involuntarily; automatic: an autonomic reflex.
2. Resulting from internal stimuli; spontaneous.
au′to·nomi·cal·ly adv.