Teredo, n. [L., a worm that gnaws wood, clothes, etc.; akin to Gr. , L. terere to rub.].
A genus of long, slender, wormlike bivalve mollusks which bore into submerged wood, such as the piles of wharves, bottoms of ships, etc.; -- called also shipworm. See Shipworm. See Illust. in Appendix. [1913 Webster]