Definition of peridium in English:

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Pronunciation: /pəˈridēəm/

noun (plural peridia /-ˈridēə/)

The outer skin of a sporangium or other fruiting body of a fungus.
Example sentences
  • Numerous golden sporangia with persistent peridia still intact formed on the bark surface and on mosses.
  • This is an example of a peridium, a rather vague term that includes any shell or membrane that encloses spores - for example, the visible outer membrane of a puffball.


Early 19th century: from Greek pēridion, literally 'small wallet', diminutive of pēra.

For editors and proofreaders

Syllabification: pe·rid·i·um

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