Pronunciation: per'i-nu're-um, -re-a
Definition: One of the supporting structures of peripheral nerve trunks, consisting of layers of flattened cells and collagenous connective tissue, which surround the nerve fasciculi and form the major diffusion barrier within the nerve; with the endoneurium and epineurium, composes the peripheral nerve stroma.
[L. fr. peri- + G. neuron, nerve]
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