fairy ring noun2 •A ring of fungi marking the periphery of the perennial underground growth of the mycelium.The best known Fungus occupant of fairy rings is the Fairy Ring Agaric or Champignon, Marasmius oreades, termed in the older botanical textbooks Agaricus oreades. — 1884 •A place where fairies congregate in a ring, particularly in order to dance.They are fond of music and dancing. It is their dancing that forms the fairy rings. — 1828 formsfairy rings
