- samarium, Sm, atomic number 62 - a gray lustrous metallic element of the rare earth group; is used in special alloys; occurs in monazite and bastnasite
--1 is a kind of metallic element, metal
--1 is a substance of bastnasite, bastnaesite; monazite - Master of Science, MS, SM, MSc - a master's degree in science
--2 is a kind of master's degree