Meaning of dead-man's fingers

dead'-man's fin'gers

Pronunciation: (ded'manz", -munz), [key]
  1. any of various fungi, sponges, plant roots, animal parts, etc., having fingerlike projections and a pale or dull color, as the gray-black woodland fungus Xylaria polymorpha or the whitish spongy gills of a food crab.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.