Cockles are small edible shellfish. or heart clam Any of approximately 250 species (family Cardiidae) of marine bivalves distributed worldwide. They range in diameter from about 0.5 in. (1 cm) to about 6 in. (15 cm). The two valves of the shell are equal in size and shape and range in colour from brown to red or yellow. Most species live just below the low-tide line, though some have been obtained from depths of more than 1,500 ft (500 m) or in the intertidal zone. Many species are marketed commercially for their meat
A wrinkle or pucker in paper Generally shows up more in heavy paper prints and water colors It is not unusual to see this effect on framed prints that are mounted using archival techniques
(verb) To wrinkle or pucker Paper cockles or buckles permanently when too much liquid is applied Frequently occurs when a volume of water-based ink is applied in a small area