雕刻(贝壳)雕刻(贝壳)
Scrimshaw \Scrim"shaw`\, v. t. To ornament, as shells, ivory, etc., by engraving, and (usually) rubbing pigments into the incised lines. [Sailor's cant. U.S.] Scrimshaw \Scrim"shaw`\, n. A shell, a whale's tooth, or the like, that is scrimshawed. [Sailor's cant, U.S.]
scrimshaw n : a carving (or engraving) on whalebone, whale ivory, walrus tusk, etc., usually by American whalers