cerebrospinal fluid

noun Physiology.
the fluid in the ventricles of the brain, between the arachnoid and pia mater, and surrounding the spinal cord.


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World English Dictionary
cerebrospinal fluid
CSF the clear colourless fluid in the spaces inside and around the spinal cord and brain

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

cerebrospinal fluid n.
Abbr. CSF
The serumlike fluid that circulates through the ventricles of the brain, the cavity of the spinal cord, and the subarachnoid space, functioning as a shock absorber.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
cerebrospinal fluid   (sěr'ə-brō-spī'nəl, sə-rē'brō-)  Pronunciation Key 
The clear fluid that fills the cavities of the brain and covers the surfaces of the brain and spinal cord. It lubricates the tissues and cushions them from shock and injury.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The evacuated cavity is left empty, filling with cerebrospinal fluid in a day
  or so.
One promising avenue of research involves searching for biomarkers such as tau
  proteins in the cerebrospinal fluid of patients.
People with parasites in their cerebrospinal fluid have a much harder future
  ahead of them.
Increased intracranial pressure can be due to a rise in cerebrospinal fluid
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