any of various wormlike marine bivalve mollusks that burrow into the timbers of ship, wharves, etc.
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How to use shipworm in a sentence
The teredo or shipworm was a serious peril in the days before the sheathing of ships.Days of the Discoverers | L. Lamprey
British Dictionary definitions for shipworm
any wormlike marine bivalve mollusc of the genus Teredo and related genera and family Teredinidae. They bore into wooden piers, ships, etc, by means of drill-like shell valves: See also piddock
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012