Final answer:
The word 'autonomic' in relation to the autonomic nervous system means involuntary. This system controls several essential body functions without conscious control, such as heart rate and glandular activity, working automatically to maintain homeostasis.
Step-by-step explanation:
The word autonomic pertaining to the autonomic nervous system (ANS) means involuntary. The ANS is responsible for controlling internal functions such as heart rate, blood flow, digestion, and glandular activity, all of which operate without conscious control. It consists of two main divisions: the sympathetic nervous system, which prepares the body for stress-related activities, and the parasympathetic nervous system, which is associated with returning the body to routine, day-to-day operations, and both work together to maintain the body's homeostasis.