pia mater

pia ma·​ter | \ ˈpī-ə-ˌmā-tər How to pronounce pia mater (audio) , ˈpē-ə-ˌmä- How to pronounce pia mater (audio) \

Definition of pia mater

: the thin vascular membrane that invests the brain and spinal cord internal to the arachnoid and dura mater

First Known Use of pia mater

14th century, in the meaning defined above

History and Etymology for pia mater

Middle English, from Medieval Latin, from Latin, tender mother

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The first known use of pia mater was in the 14th century

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Cite this Entry

“Pia mater.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pia%20mater. Accessed 16 Jan. 2021.

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More Definitions for pia mater

pia mater

pia ma·​ter | \ -ˈmāt-ər How to pronounce pia mater (audio) \

Medical Definition of pia mater

: the delicate and highly vascular membrane of connective tissue investing the brain and spinal cord, lying internal to the arachnoid and dura mater, dipping down between the convolutions of the brain, and sending an ingrowth into the anterior fissure of the spinal cord

called also pia

More from Merriam-Webster on pia mater

Britannica.com: Encyclopedia article about pia mater

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