Meaning of exoperidium

ex•o•pe•rid•i•um

Pronunciation: (ek"sō-pu-rid'ē-um), [key]
— pl. -rid•i•a
  1. the outer of the two layers into which the peridium is divided.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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