甲骨 Traditional form: 甲骨 Pinyin (reading): jiǎgǔ Definitions: tortoise shells and animal bones used for divination in the Shang Dynasty (c. 16th to 11th century BC); oracle bones Characters: 甲 - armor, shell; fingernails; 1st heavenly stem 骨 - bone; skeleton; frame, framework Traditional characters: 甲 - armor, shell; fingernails; 1st heavenly stem 骨 - bone; skeleton; frame, framework