third ventricle

noun

: the median unpaired ventricle of the brain bounded by parts of the telencephalon and diencephalon

Example Sentences

Recent Examples on the Web The consistent pathology of the disorder allowed von Economo to localize the lethargic symptoms of encephalitis lethargica to the posterior wall of the third ventricle, near the oculomotor nuclei. —

Neuroskeptic, Discover Magazine, 15 Apr. 2018 The other option is a procedure called an endoscopic third ventriculostomy (ETV), which entails placing a tiny hole at the bottom of the third ventricle of the brain so cerebrospinal fluid can drain more easily. —

Korin Miller, Health.com, 7 Dec. 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'third ventricle.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1615, in the meaning defined above

Time Traveler

The first known use of third ventricle was in 1615

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Cite this Entry

Style

“Third ventricle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/third%20ventricle. Accessed 1 Apr. 2023.

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