The Collaborative International Dictionary
Thunderworm
Thunderworm \Thun"der*worm`\, n. (Zo["o]l.) A small, footless, burrowing, snakelike lizard ( Rhineura Floridana) allied to Amphisb[ae]na, native of Florida; -- so called because it leaves its burrows after a thundershower.
Wiktionary
thunderworm
n. A small burrowing snake-like lizard (''Rhineura floridana'') native to Florida.