单词	piddock
释义	piddock /ˈpɪdək / noun A bivalve mollusc which bores into soft rock or other firm surfaces. The valves of the shell have a conspicuous gap between them and rough frontal ridges to aid in boring. Pholas and other genera, family Pholadidae. In SE Asia piddocks may be boiled and eaten with sauce and rice, or sautéed with shallots, or made into a curry.... The piddock has a thin, brittle shell that is similar in shape and sculpturing on both sides. Some boring shellfish bore with chemistry, but the American piddock is a mechanical borer – repetitively grinding its shell with a rotating movement backward and forward to create a burrow for itself in softer substrates in the shallows of the intertidal zones. Origin Mid 19th century: of unknown origin.
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