WordNet (r) 3.0 (2006):

Sm
    n 1: a grey lustrous metallic element of the rare earth group;
         is used in special alloys; occurs in monazite and
         bastnasite [syn: samarium, Sm, atomic number 62]
    2: a master's degree in science [syn: Master of Science, MS,
       SM, MSc]

The Free On-line Dictionary of Computing (19 January 2023):

sm

    The country code for San Marino.

   (1999-01-27)