radium radishlike • radiumization · · · Info · Definitions · Synonyms · Characters · · radium · · Text Latin · · Script 6 · · Length Definitions · · · (noun) an intensely radioactive metallic element that occurs in minute amounts in uranium ores. Synonyms: Ra, atomic number 88. · · Noun Definition 1 Synonyms · · · ra · · Synonym 1 atomic number 88 · · Synonym 2 Characters · · a latin small letter a U+0061 d latin small letter d U+0064 i latin small letter i U+0069 m latin small letter m U+006D r latin small letter r U+0072 u latin small letter u U+0075