Punty definitions

pŭn'tē
An iron rod on which molten glass is handled when being shaped and worked.
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A metal rod on which the molten glass is handled in glassmaking.
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(glassblowing) A metal rod used in the glassblowing process. After a glass vessel has been blown to approximate size and the bottom of the piece has been finalized, the rod, which is tipped with a wad of hot glass, is attached to the bottom of the vessel to hold it while the top is finalized. It often leaves an irregular or ring-shaped scar on the base when removed called the "pontil mark".
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Origin of punty

1662, from French pontil, from Italian pontello or puntello, dim. of punto, from Latin punctum (“a point")