nervous system

noun

: the bodily system that in vertebrates is made up of the brain and spinal cord, nerves, ganglia, and parts of the receptor organs and that receives and interprets stimuli and transmits impulses to the effector organs see autonomic nervous system, central nervous system, peripheral nervous system

Examples of nervous system in a Sentence

Recent Examples on the Web
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The heart possesses its own sophisticated nervous system, often referred to as the brain in the heart. Dr. Shiny Burcu Unsal, Forbes.com, 4 Aug. 2026 Do not confuse availability with connection, especially when your nervous system already feels crowded. Tarot.com, The Orlando Sentinel, 3 Aug. 2026 The Marine Rain Massage is an immersive treatment that releases muscle tension, calms the nervous system, and activates circulation. Rana Good, Condé Nast Traveler, 1 Aug. 2026 Aphids, whiteflies, beetles and fleas Woolsey explains that neonicotinoids work by targeting receptors found mostly in insect nervous systems. Nicole Hernandez, USA Today, 1 Aug. 2026 See All Example Sentences for nervous system

Word History

First Known Use

1703, in the meaning defined above

Time Traveler
The first known use of nervous system was in 1703

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Cite this Entry

“Nervous system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nervous%20system. Accessed 7 Aug. 2026.

Kids Definition

nervous system

noun
: the bodily system that receives stimuli, decides on their importance, and sends nerve impulses to the organs of action and that in vertebrates is made up of brain and spinal cord, nerves, ganglia, and parts of the receptor organs

Medical Definition

nervous system

noun
: the bodily system that in vertebrates is made up of the brain and spinal cord, nerves, ganglia, and parts of the receptor organs and that receives and interprets stimuli and transmits impulses to the effector organs see autonomic nervous system, central nervous system, peripheral nervous system

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