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.

THUNDERSTORM
Thun"der*storm`, n.

Defn: A storm accompanied with lightning and thunder.

THUNDERSTRIKE Thun"der*strike`, v. t. [imp. Thunderstruck; p. p. Thunderstruck, - strucken (; p. pr. & vb. n. Thunderstriking.]

1. To strike, blast, or injure by, or as by, lightning. [R.] Sir P. Sidney.

2. To astonish, or strike dumb, as with something terrible; — rarely used except in the past participle. drove before him, thunderstruck. Milton.

THUNDERWORM
Thun"der*worm`, n. (Zoöl.)

Defn: A small, footless, burrowing, snakelike lizard (Rhineura Floridana) allied to Amphisbæna, native of Florida; — so called because it leaves its burrows after a thundershower.