Toadstone
Pronunciation : Toad"stone`
Part of Speech : n.
Definition : 1. (Min.)
Defn: A local name for the igneous rocks of Derbyshire, England; -- said by some to be derived from the German todter stein, meaning dead stone, that is, stone which contains no ores.
2. Bufonite, formerly regarded as a precious stone, and worn as a jewel. See Bufonite.
Source : Webster's Unabridged Dictionary, 1913