n. Any of a group of tough, leathery poroid mushrooms similar to boletes but typically lacking a distinct stalk.
The Century Dictionary and Cyclopedia
n. A fungus belonging to the genus Polyporus.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. woody pore fungi; any fungus of the family Polyporaceae or family Boletaceae having the spore-bearing surface within tubes or pores; the fruiting bodies are usually woody at maturity and persistent
Word Usage
"Reishi has a smooth, dark-reddish-mahogany varnished cap, with whitish edges when young, but flip it over and you'll find a white-yellowish underside filled with tiny pin-prick pores it's a polypore, a brown spore print."