Basidium

n.

1.

(Bot.) A special oblong or pyriform cell, with slender branches, which bears the spores in that division of fungi called Basidiomycetes, of which the common mushroom is an example.

Noun

1.

basidium - a small club-shaped structure typically bearing four basidiospores at the ends of minute projections; unique to basidiomycetes

hypobasidium, promycelium, reproductive structure