noun (plural peridia /-ˈridēə/)Botany
The outer skin of a sporangium or other fruiting body of a fungus.
- 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.
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