any of an order (Agaricales) of basidiomycetous fungi; esp., any of a family (Agaricaceae)
of gill fungi, including many common, edible mushrooms
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
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Word origin of 'agaric'L agaricum, larch fungus < Gr agaricon, tree fungus, after Agaria, a Sarmatian town