Dysprosium

While working with rare earth ores, a new element called dysprosium (Greek "hard to get at") was discovered. This advanced the understanding and classification of rare earth elements.
 Lecoq de Boisbaudran France 1886 Dysprosium

While working with rare earth ores, a new element called dysprosium (Greek "hard to get at") was discovered. This advanced the understanding and classification of rare earth elements.