Pronunciation: (bu-sid'ē-um), [key]
—pl. -sid•i•aPronunciation: (-sid'ē-u). [key] Mycol.
a special form of sporophore, characteristic of basidiomycetous fungi, on which the sexual spores are borne, usually at the tips of slender projections.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.