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The Collaborative International Dictionary
Peridia

Peridium \Pe*rid"i*um\, n.; pl. Peridia. [NL., fr. Gr. ? about + ?, a dim. ending.] (Bot.) The envelope or coat of certain fungi, such as the puffballs and earthstars.

Wiktionary
peridia

n. (plural of peridium English)

WordNet
peridium
  1. n. outer layer of the spore-bearing organ in many fungi

  2. [also: peridia (pl)]

peridia

See peridium