sm

Noun sm has 2 senses

• sm(n = noun.substance) atomic number 62, samarium - a grey lustrous metallic element of the rare earth group; is used in special alloys; occurs in monazite and bastnasite;
is a kind of metal, metallic element

• sm(n = noun.communication) master of science, ms, msc - a master's degree in science;
is a kind of master's degree