SHIPWORM
shipworm, teredinid
(noun) wormlike marine bivalve that bores into wooden piers and ships by means of drill-like shells
Source: WordNet® 3.1
Etymology
Noun
shipworm (plural shipworms)
Any of several wormlike marine mollusks (not true worms) of the family Teredinidae, that bore through the wooden hulls of ships and other woody material immersed in salt water.
Hyponyms
• (molluscs in Teredinidae): Kuphus polythalamia (giant tube worm)
Source: Wiktionary
Ship"worm`, n. (Zoöl.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition