croggan noun2 •A limpet shell.Then she saw Tom sitting on the chimney-stool, and his wife taking on the tip of her finger from a croggan (limpet-shell) what appeared to be salve, which she rubbed over her husband's eyes. — 1873 •(Scotland) A clay urn made by hand in the Outer Hebrides.He had sent the ground officer with a "croggan of tar" with which he marked the ears of all the stock. — 1982 formscroggans
