autonomic nervous system autonomic ganglion • autonomic plexus · · · Info · Definitions · Synonyms · Characters · · autonomic nervous system · · Text Common · · Latin · · Scripts 24 · · Length 9 · · Syllables Definitions · · · (noun) the part of the nervous system of vertebrates that controls involuntary actions of the smooth muscles and heart and glands. Synonyms: autonomic nervous system, ANS. · · Noun Definition 1 Synonyms · · · ans · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 u latin small letter u U+0075 v latin small letter v U+0076 y latin small letter y U+0079