Thunderstone
Pronunciation : Thun"der*stone`
Part of Speech : n.
Definition : 1. A thunderbolt, -- formerly believed to be a stone. Fear no more the lightning flash, Nor the all-dreaded thunderstone. Shak.
2. (Paleon.)
Defn: A belemnite. See Belemnite.
Source : Webster's Unabridged Dictionary, 1913