Coc·kle n.
 1. Zool. A bivalve mollusk, with radiating ribs, of the genus Cardium, especially Cardium edule, used in Europe for food; -- sometimes applied to similar shells of other genera.
 2. A cockleshell.
 3. The mineral black tourmaline or schorl; -- so called by the Cornish miners.
 4. The fire chamber of a furnace. [Eng.]
 5. A hop-drying kiln; an oast.
 6. The dome of a heating furnace.
 Cockle hat, a hat ornamented with a cockleshell, the badge of a pilgrim. --Shak.
 Cockle stairs, winding or spiral stairs.