What does "pixie" mean?

Pixie: (Bot.) A low creeping evergreen plant (Pyxidanthera barbulata), with mosslike leaves and little white blossoms, found in New Jersey and southward, where it flowers in earliest spring. Pixy ring, a fairy ring or circle. [Prov. Eng.] -- Pixy stool (Bot.), a toadstool or mushroom. [Prov. Eng.]

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