/seuh mahr"skuyt/ , n.
a velvet-black mineral, a complex columbate-tantalate of uranium, cerium, etc., occurring in masses: a minor source of uranium, thorium, and rare-earth oxides.
[ Samarskit (1847), after Russian mining engineer V.E. Samarskii- Bykhovets (1803-70); see -ITE 1 ]