noun pl \ə-ˌgar-ə-ˈkā-sē-ˌē\

Definition of AGARICACEAE

: a large family of fungi (order Agaricales) that contains the genera Agaricus and Amanita and includes many familiar mushrooms with the sporophore usually consisting of a central stalk and a cap like an umbrella on the lower surface of which are numerous lamellae bearing the hymenium

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