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[per-uh-noo r-ee-uh m, -nyoo r-] /ˌpɛr əˈnʊər i əm, -ˈnyʊər-/
noun, plural perineuria
[per-uh-noo r-ee-uh, -nyoo r-] /ˌpɛr əˈnʊər i ə, -ˈnyʊər-/ (Show IPA).
the sheath of connective tissue that encloses a bundle of nerve fibers.
Origin of perineurium
From New Latin, dating back to 1835-45; See origin at peri-, neur-, -ium
Related forms
perineurical, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for perineurium


the connective tissue forming a sheath around a single bundle of nerve fibres
Derived Forms
perineurial, adjective
Word Origin
C19: from New Latin, from peri- + Greek neuron nerve
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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perineurium in Medicine

perineurium per·i·neu·ri·um (pěr'ə-nur'ē-əm, -nyur'-)
n. pl. per·i·neu·ri·a (-nur'ē-ə, -nyur'-)
The sheath of connective tissue enclosing a bundle of nerve fibers.

per'i·neu'ri·al adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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