\Sa*ma"ri*um\, n. [NL., fr. E. samarskite.] (Chem.)
A rare metallic element of doubtful identity.
Note: Samarium was discovered, by means of spectrum analysis,
      in certain minerals (samarskite, cerite, etc.), in
      which it is associated with other elements of the
      earthy group. It has been confounded with the doubtful
      elements decipium, philippium, etc., and is possibly a
      complex mixture of elements not as yet clearly
      identified. Symbol Sm. Provisional atomic weight 150.2.