witches' stone
noun1
A small ledge jutting out of the chimney of a house, chiefly in Jersey or Guernsey, originally to stop rain seeping under the joins in a thatched roof, and later reinterpreted in folklore as a place for witches to rest.
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2
An adder stone, a stone with a (natural) hole in it.
- For quotations using this term, see Citations:witches' stone.
3
Used other than figuratively or idiomatically: see witch, stone.