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1. Any of various polymers containing the urethane radical; a wide variety of synthetic forms are made and used as adhesives, plastics, paints or rubber
   - PUR

1. A solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239
   - plutonium, atomic number 94

Type of: chemical element, element, polymer

Encyclopedia: PU