scrim·shaw /ˈskrɪmˌʃɔ/
(vt.)(vi.)彫刻(貝殼)彫刻(貝殼)
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.]
Scrim·shaw, n. A shell, a whale's tooth, or the like, that is scrimshawed. [Sailor's cant, U.S.]
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scrimshaw
n : a carving (or engraving) on whalebone, whale ivory, walrus
tusk, etc., usually by American whalers