devil's finger

Noun

devil's finger (plural devil's fingers)

1. A belemnite, any of various extinct species of cephalopod in the order Belemnitida.
2. The fossil remains of such a cephalopod.
   • LXXVI. Belemnites, a conical or fusiform stone, of brown radiating spar, […] Various names have been assigned to this fossil; many of which, derived from the ridiculous notions entertained by the vulgar, in the early ages, need only be mentioned. Such are, devil’s fingers, Spectrorum candela, and...1811, James Parkinson, Organic Remains of a Former World, page 122
   • In the Middle Ages, when fields in the Norfolk chalk and Oxford clay outcrops of England were ploughed, they would appear after a thunderstorm. The myth soon emerged that they were thunderbolts. It is more likely that the heavy downpour had washed away the surrounding soil to reveal the fossils....2007 February 12, “Fossils: myths, mystery and magic”, in Belfast Telegraph, page 1

   Synonyms:

   fingerstone