fairy circle(n = noun.plant) fairy ring - a ring of fungi marking the periphery of the perennial underground growth of the mycelium;
is a kind of anchor ring, annulus, doughnut, halo, ring

antarctic circle, arctic circle, back circle, bad fairy, charmed circle, circle, circle around, circle of curvature, circle of willis, circle round, color circle, dip circle, double leg circle, dress circle, equinoctial circle, fairy, fairy armadillo, fairy bell, fairy bluebird, fairy cup, fairy godmother, fairy lantern, fairy light, fairy ring, fairy shrimp, fairy story, fairy swallow, fairy tale, family circle, full circle, golden fairy lantern, grand circle, great circle, hour circle, in a circle, inner circle, osculating circle, parhelic circle, parquet circle, polar circle, tooth fairy, traffic circle, vertical circle, vicious circle, white fairy lantern, winner's circle