volva

noun4

1. •
   A cup-shaped mass at the base of various fungi.

   • The genus Amanita has both a volva and a veil; the spores are white, and the stem is easily separable from the cap. — 1903
2. •
   The membranous covering which completely encloses many fungi in the early stage of growth.
3. •
   Any prophetess, sooth-sayer, or witch.
4. •
   (historical) In Old Norse society, a female practitioner of magic divination and prophecy.

   • In the Eddas, Odin conjures up a dead volva and questions her about Baldur's fate. — 1988