Definition of peridium in English:

peridium

Line breaks: per|idium
Pronunciation: /pɪˈrɪdɪəm
 
/

noun (plural peridia /-dɪə/)

Botany
The outer skin of a sporangium or other fruiting body of a fungus.
More 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.

Origin

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

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