a bivalve mollusk, with radiating ribs, of the genus cardium, especially c. edule, used in europe for food; -- sometimes applied to similar shells of other genera.-a cockleshell.-the mineral black tourmaline or schorl; -- so called by the cornish miners.-the fire chamber of a furnace.-a hop-drying kiln; an oast.-the dome of a heating furnace.-to cause to contract into wrinkles or ridges, as some kinds of cloth after a wetting.-a plant or weed that grows among grain; the corn rose (luchnis githage).-the lotium, or darnel.