uranium uranitic • uranocircite · · · Info · Definitions · Synonyms · Characters · · uranium · · Text Latin · · Script 7 · · Length Definitions · · · (noun) a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons. Synonyms: U, atomic number 92. · · Noun Definition 1 Synonyms · · · u · · Synonym 1 atomic number 92 · · Synonym 2 Characters · · a latin small letter a U+0061 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 u latin small letter u U+0075