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amanita Definition

ama·nita (am′ə nēt′ə)

noun

any of a genus (Amanita) of mushrooms (order Agaricales), with white spores and, usually, white gills, some of which, as the death cap and the fly agaric, are very poisonous

Etymology: ModL < Gr amanitai, pl., a kind of fungus