a specialized sexual reproductive cell found in the fertile area of the hymenium of all Basidiomycetes, typically shaped like a baseball bat. A basidium possesses four slightly inwardly curved horns (sterigma) to which the basidiospores are attached.
A cell in which karyogamy and meiosis take place and which bears exogenous spores of sexual origin. (Pl. basidia.) ( 15)
The basidium (pl., basidia) is a microscopic structure found on the hymenophore of fruiting bodies of basidiomycete fungi. As such, the presence of basidia is one of the main characteristic features of the Basidiomycota. The basidium usually bears four sexual spores called basidiospores; occasionally the number may be two or even eight.