perineurium

noun

peri·​neu·​ri·​um ˌper-ə-ˈnu̇r-ē-əm How to pronounce perineurium (audio)
-ˈnyu̇r-
plural perineuria ˌper-ə-ˈnu̇r-ē-ə How to pronounce perineurium (audio)
-ˈnyu̇r-
: the connective-tissue sheath that surrounds a bundle of nerve fibers

Word History

Etymology

New Latin, from peri- + Greek neuron nerve — more at nerve

First Known Use

1867, in the meaning defined above

Time Traveler
The first known use of perineurium was in 1867

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Cite this Entry

“Perineurium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/perineurium. Accessed 21 Mar. 2025.

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Medical Definition

perineurium

noun
peri·​neu·​ri·​um ˌper-ə-ˈn(y)u̇r-ē-əm How to pronounce perineurium (audio)
plural perineuria -ē-ə How to pronounce perineurium (audio)
: the sheath of connective tissue that surrounds a bundle of nerve fibers
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