'Samarskite' definitions:

Definition of 'samarskite'

(from WordNet)
noun
A complex black mineral occurring in pegmatites

Definition of 'Samarskite'

From: GCIDE
  • Samarskite \Sa*mar"skite\, a. [After Samarski, a Russian.] (Min.) A rare mineral having a velvet-black color and submetallic luster. It is a niobate of uranium, iron, and the yttrium and cerium metals. [1913 Webster]