Shipworm
Pronunciation : Ship"worm`
Part of Speech : n.
Definition : Defn: Any long, slender, worm-shaped bivalve mollusk of Teredo and allied genera. The shipworms burrow in wood, and are destructive to wooden ships, piles of wharves, etc. See Teredo.
(Zo?l.)
Source : Webster's Unabridged Dictionary, 1913