Plural of basidium; the spore-producing structures found on fungi like mushrooms.
From Latin 'basis' (base, pedestal) + Greek '-idium' (diminutive suffix). Named for their shape as small structures on the base of fungal fruiting bodies.
Mushrooms release billions of spores from these microscopic clubs—basisidia are why you see that fine powder when you brush a mushroom's underside; that's fungal reproduction in action!
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