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n. Any of various wormlike marine mollusks of the genera Teredo and Bankia, having rudimentary bivalve shells with which they bore into wood, especially the submerged timbers of ships and wharves, often doing extensive damage.

n. 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 entering the sea.

n. 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.

n. A bivalve mollusk of the genus Teredo, especially T. navalis, which bores into and destroys the timber of ships, piles, and other submerged woodwork; a ship-borer. It has very long united siphons, and thus looks like a worm. See Tere dinidæ and Teredo.

n. wormlike marine bivalve that bores into wooden piers and ships by means of drill-like shells

"A number of maritime treasures off Sweden's southern coast are under threat from the shipworm, which is gaining a foothold in the Baltic Sea due to climate change, according to researchers at the University of Gothenburg."

clam   

teredo   

bankia setaceae    teredo    giant northwest shipworm