Definition of peridium in English:

peridium

noun

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

    • ‘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.’
    • ‘Numerous golden sporangia with persistent peridia still intact formed on the bark surface and on mosses.’

Origin

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

Pronunciation

peridium

/pəˈridēəm/