プラセオジムalso: プラセオジウムプラセオジムMeanings1nounpraseodymium (Pr)Chemical element with atomic number 59. A rare-earth metal.from German Praseodymプラセオジムは希き土ど類るい元げん素その一ひとつです。Praseodymium is one of the rare-earth elements.
