The Collaborative International Dictionary of English v.0.48:
Agaric \Ag"a*ric\ (?; 277), n. [L. agaricum, Gr. ?, said to be
fr. Agara, a town in Sarmatia.]
1. (Bot.) A fungus of the genus Agaricus, of many species,
of which the common mushroom is an example.
2. An old name for several species of Polyporus, corky
fungi growing on decaying wood.
Note: The "female agaric" (Polyporus officinalis) was
renowned as a cathartic; the "male agaric" (Polyporus
igniarius) is used for preparing touchwood, called
punk or German tinder.
Agaric mineral, a light, chalky deposit of carbonate of
lime, sometimes called rock milk, formed in caverns or
fissures of limestone.