atomic number 65 1
rzeczownikdomena: substancja
Princeton WordNet [ver.3.1]
Definicja
a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
a metallic element of the rare earth group; used in lasers; occurs in apatite and monazite and xenotime and ytterbite
