Tysonite

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Tysonite \Ty"son*ite\, n. [After S. T. Tyson.] (Min.)
     A fluoride of the cerium metals occurring in hexagonal
     crystals of a pale yellow color. Cf. {Fluocerite}.
     [1913 Webster]