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1 A hole made through a piece of bone, stone, or other hard material by grinding or drilling a conical depression from one side only of the material, work proceeding until the tip of the cutter emerges on the other side. See also hour‐glass perforation.

2 In making buttons, V‐perforations involve drilling two convergent holes until they meet at an angle within the body of the button. Especially common in the European early Bronze Age.

Subjects: Archaeology.

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