cerebrospinal fluid

noun

: a colorless liquid that is comparable to serum, is secreted from the blood into the lateral ventricles of the brain, and serves chiefly to maintain uniform pressure within the brain and spinal cord

Examples of cerebrospinal fluid in a Sentence

Recent Examples on the Web
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Besides PET scans, the only similar diagnostic tool involves cerebrospinal fluid (CSF) analysis, which requires challenging and invasive lumbar punctures, or spinal taps. Bronwyn Thompson, New Atlas, 20 May 2025 To qualify for drug treatment, Alzheimer’s patients now generally get a specialized PET scan to detect amyloid in their brains or undergo a cerebrospinal fluid test. Bloomberg News, Boston Herald, 17 May 2025 According to the agency, roughly 92 percent of trial participants who got positive test results were found to have the presence of amyloid plaques through PET scans or cerebrospinal fluid analysis. Joseph Choi, The Hill, 16 May 2025 These protective membranes are vital for providing structural support, cushioning tissue, improving circulation of cerebrospinal fluid and enhancing immune health by providing a defensive barrier against disease. Daryl Austin, USA Today, 26 Apr. 2025 See All Example Sentences for cerebrospinal fluid

Word History

First Known Use

1828, in the meaning defined above

Time Traveler
The first known use of cerebrospinal fluid was in 1828

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Cite this Entry

“Cerebrospinal fluid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cerebrospinal%20fluid. Accessed 25 May. 2025.

Kids Definition

cerebrospinal fluid

noun
ce·​re·​bro·​spi·​nal fluid
sə-ˌrē-brō-ˌspīn-ᵊl-
: a colorless fluid that occupies the cavities of the brain and spinal cord and the space between these and the membranes surrounding them

Medical Definition

cerebrospinal fluid

noun
: a liquid that is comparable to serum but contains less dissolved material, that is secreted from the blood into the lateral ventricles of the brain by the choroid plexus, circulates through the ventricles to the spaces between the meninges about the brain and spinal cord, and is resorbed into the blood through the subarachnoid sinuses, and that serves chiefly to maintain uniform pressure within the brain and spinal cord

called also spinal fluid

compare lymph

More from Merriam-Webster on cerebrospinal fluid

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