D defs.my
Entry 2 senses Webster, 1913

Snakestone

· Snake·stone · IPA
01 n. A kind of hone slate or whetstone obtained in Scotland.
  1. 1.
    A kind of hone slate or whetstone obtained in Scotland.
  2. 2.
    An ammonite; -- so called from its form, which resembles that of a coiled snake.(Paleon.)