[ per-uh-noo r-ee-uh m, -nyoo r- ]
/ ˌpɛr əˈnʊər i əm, -ˈnyʊər- /

noun, plural per·i·neu·ri·a [per-uh-noo r-ee-uh, -nyoo r-] /ˌpɛr əˈnʊər i ə, -ˈnyʊər-/. Anatomy.

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 formsper·i·neu·ri·cal, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for perineurium


/ (ˌpɛrɪˈnjʊərɪəm) /


the connective tissue forming a sheath around a single bundle of nerve fibres
Derived Formsperineurial, adjective

Word Origin for perineurium

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

Medicine definitions for perineurium


[ pĕr′ə-nurē-əm ]

n. pl. per•i•neu•ri•a (-ē-ə)

The sheath of connective tissue enclosing a bundle of nerve fibers.
Related formsper′i•neuri•al adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.