— lantanidák (ritkaföldfémek): lantán, prazeodímium, szamárium, gadolínium, diszprózium, erbium, itterbium, cérium, neodímium, európium, terbium, holmium, túlium, lutécium.
— lanthanides (rare earth metals): lanthanum, praseodymium, samarium, gadolinium, dysprosium, erbium, ytterbium, cerium, neodymium, europium, terbium, holmium, thulium, lutetium.EurLex-2 EurLex-2