from the GNU version of the Collaborative International Dictionary of English
- n. The envelope or coat of certain fungi, such as the puffballs and earthstars.
from The Century Dictionary and Cyclopedia
- n. The outer enveloping coat of a sporophore in angiocarpous fungi, upon which the spores develop in a closed cavity.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. outer layer of the spore-bearing organ in many fungi
Sorry, no etymologies found.
Peridium, the wall of the puff-balls, etc. Pileus (pl. pilei), the cap of the mushroom.