[ ˌpreɪzɪə(ʊ)'dɪmɪəm ]
■ noun the chemical element of atomic number 59, a soft silvery-white metal of the lanthanide series. (Symbol: Pr )
Origin
C19: mod. L., from Ger. Praseodym , from Gk prasios 'leek-green' (because of its green salts) + Ger. Didym 'didymium'.