1. autonomous.
  2. of or relating to the autonomic nervous system.
  3. Physiology. under the control of the autonomic nervous system.
  4. Cell Biology. produced by internal forces or causes; spontaneous.
Also au·to·nom·i·cal.

Origin of autonomic

First recorded in 1825–35; autonom(y) + -ic
Related formsau·to·nom·i·cal·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for autonomically


  1. occurring involuntarily or spontaneously
  2. of or relating to the autonomic nervous system
  3. Also: autonomous (of plant movements) occurring as a result of internal stimuli
Derived Formsautonomically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for autonomically



1832, "pertaining to autonomy" (q.v.); used mostly in physiology. Autonomical is recorded from 1650s.

Online Etymology Dictionary, © 2010 Douglas Harper

autonomically in Medicine


  1. Functionally independent; not under voluntary control.
  2. Relating to the autonomic nervous system.
Related formsau′to•nomi•cal•ly adv.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.