spinal cord

noun

: the cord of nervous tissue that extends from the brain lengthwise along the back in the spinal canal, gives off the pairs of spinal nerves, carries impulses to and from the brain, and serves as a center for initiating and coordinating many reflex acts see brain illustration

Examples of spinal cord in a Sentence

Recent Examples on the Web
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In this retrospective review, the researchers examined the past medical records of 114 chronic pain patients who had spinal cord stimulation (SCS) or intrathecal pain pump (ITP) implants. New Atlas, 13 Oct. 2025 The traumatic event marked a profound turning point in his life, shifting his focus from acting to becoming an advocate for spinal cord injury research and treatment. Maddie Garfinkle, PEOPLE, 10 Oct. 2025 Another diagnostic option involves measuring amyloid beta and certain modified forms of tau in the cerebrospinal fluid that surrounds the brain and spinal cord, but collecting this fluid requires a lumbar puncture, which many people find too invasive. Robert Martone, Scientific American, 10 Oct. 2025 Also commonly referred to as Lou Gehrig’s disease, ALS is a degenerative disease that impacts the motor neurons of the brain and spinal cords, with a life expectancy of two to five years after symptoms first begin. Ct Jones, Rolling Stone, 9 Oct. 2025 See All Example Sentences for spinal cord

Word History

First Known Use

1834, in the meaning defined above

Time Traveler
The first known use of spinal cord was in 1834

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Cite this Entry

“Spinal cord.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spinal%20cord. Accessed 18 Oct. 2025.

Kids Definition

spinal cord

noun
: the cord of nervous tissue that extends from the brain along the back in the cavity of the backbone, branches to form the spinal nerves, carries nerve impulses to and from the brain, and helps to control reflex actions

Medical Definition

spinal cord

noun
: the thick longitudinal cord of nervous tissue that in vertebrates extends along the back dorsal to the bodies of the vertebrae and is enclosed in the spinal canal formed by their neural arches, is continuous anteriorly with the medulla oblongata, gives off at intervals pairs of spinal nerves to the various parts of the trunk and limbs, serves not only as a pathway for nerve impulses to and from the brain but as a center for carrying out and coordinating many reflex actions independently of the brain, and is composed largely of white matter arranged in columns and tracts of longitudinal fibers about a large central core of gray matter somewhat H-shaped in cross section and pierced centrally by a small longitudinal canal continuous with the ventricles of the brain

called also medulla spinalis

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