perineurium

[per-uh-noor-ee-uhm, -nyoor-]

noun

Anatomy.

plural

perineuria 

1. the sheath of connective tissue that encloses a bundle of nerve fibers.

perineurium

/ ˌpɛrɪˈnjʊərɪəm /

noun

1. the connective tissue forming a sheath around a single bundle of nerve fibres

Other Word Forms

• perineurical adjective
• perineurial adjective

Word History and Origins

Origin of perineurium¹

From New Latin, dating back to 1835–45; peri-, neur-, -ium

Word History and Origins

Origin of perineurium¹

C19: from New Latin, from _peri- + Greek neuron nerve

Example Sentences

The nerve fibres there figured are bound together by endoneurium into small ropes, the nerves, encased in perineurium.

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The tumours, which vary greatly in size and number—as many as a thousand have been counted in one case—are enclosed in a capsule derived from the perineurium.

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