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Polyduranium is a material, a type of metal. Named for its relation to duranium, this substance was used by several states and races, mainly for robust reinforcement of spacecraft framing and hulls; and as a strengthened material in armor and weapons.

History and specifics

In the year 2153, polyduranium was encountered by Enterprise in the doors of a Delphic Expanse sphere and in the hull of an Osaarian ship. (ENT episode: "Anomaly")

The hull plating of the USS Defiant included a mix of polyduranium, kelindide, rodinium and toranium. (ST reference: Star Trek: Deep Space Nine Technical Manual)

Polyduranium was also used in a bulkhead on the bridge of the Defiant. In 2371, Ornithar expressed an interest in it but he believed it had no real value. (DS9 episode: "The Search")

Polyduranium is also used in the casing of Klingon bat'leths. (ST reference: Star Trek: Deep Space Nine Technical Manual)

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