资料来源 : pyDict

菊石,据说能治好蛇咬伤的一种石头

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Snakestone \Snake"stone`\, n.
   1. A kind of hone slate or whetstone obtained in Scotland.

   2. (Paleon.) An ammonite; -- so called from its form, which
      resembles that of a coiled snake.