[sympathetic nervous system] n (ca. 1891): the part of the autonomic nervous system that contains chiefly adrenergic fibers and tends to depress secretion, decrease the tone and contractility of smooth muscle, and increase heart rate--compare parasympathetic nervous system
SYMPATHETIC NERVOUS SYSTEM
Meaning of SYMPATHETIC NERVOUS SYSTEM in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012