pia mater

American  

[pahy-uh mey-ter, pee-uh] / ˈpaɪ ə ˈmeɪ tər, ˈpi ə /

noun

Anatomy.

1. the delicate, fibrous, and highly vascular membrane forming the innermost of the three coverings of the brain and spinal cord.

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pia mater British  

/ ˈpaɪə ˈmeɪtə /

noun

1. the innermost of the three membranes (meninges) that cover the brain and spinal cord See meninges

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pia mater Scientific  

/ pī′əmā′tər,pē′əmä′tər /

1. The fine vascular membrane that closely envelops the brain and spinal cord under the arachnoid and the dura mater.

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Etymology

Origin of pia mater

First recorded in 1350–1400; Middle English, from Medieval Latin: literally, “pious mother,” erroneous translation of Arabic umm raqīqah “tender mother,” Arabic umm “mother” also serving as an indicator of relationship between things; cf. dura mater ( def. )

Example Sentences

See Examples For:

pia mater

It then circulates through the ventricles and into the subarachnoid space, between the pia mater and the arachnoid mater.

From Textbooks ● Jun. 19, 2013

The name pia mater comes from the Latin for “tender mother,” suggesting the thin membrane is a gentle covering for the brain.

From Textbooks ● Jun. 19, 2013

The outermost layer is the dura mater, the middle layer is the web-like arachnoid mater, and the inner layer is the pia mater, which directly contacts and covers the brain and spinal cord.

From Textbooks ● Apr. 25, 2013

The growths frequently erode, in one direction through the dura mater and into the skull, in the other direction through the pia mater to the brain itself.

From Time Magazine Archive

The arachnoid membrane was, in many parts, without its natural transparency: the pia mater was generally suffused with blood, and its vessels were enlarged: the consistence of the brain was firm.

From Observations on Insanity With Practical Remarks on the Disease and an Account of the Morbid Appearances on Dissection by John Haslam