Hypertext Webster Gateway: "peridium"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
From WordNet (r) 1.7 (wn)
peridium
n : outer layer of the spore-bearing organ in many fungi
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