piddock

(pidək)

noun

any of a family (Pholadidae) of bivalve mollusks which bore holes in mud, peat, wood, clay, and soft rocks

Origin: < ?

See piddock in American Heritage Dictionary 4

noun
A marine bivalve mollusk of the family Pholadidae, having a long shell with which it bores into wood, rock, and clay, often causing destruction of wharf pilings.

Origin:

Origin: Origin unknown

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