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basidio-

A basidium.

Greek basidion, a diminutive of basis, base or pedestal.

A basidium is a microscopic club-shaped spore-bearing structure produced by fungi called basidiomycetes (Greek mukēs, mukēt‑, fungus or mushroom), such as the smuts, rusts, mushrooms, and puffballs; basidio‑ refers to the presence of a basidium, as in basidiospore, a spore formed in one, or basidiocarp, the fruiting body of basidiomycetes that produces them.