Learn how to say Agaricaceae correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word agaric:
a fungus with a fruiting body that resembles a mushroom, having a convex or flattened cap with gills on the underside.
Order Agaricales, class Hymenomycetes, in particular the mushroom family Agaricaceae
late Middle English (originally denoting various bracket fungi with medicinal or other uses): from Latin agaricum, from Greek agarikon ‘tree fungus’