'Ceylonite' definitions:

Definition of 'Ceylonite'

From: WordNet
noun
A dark-colored spinel containing iron [syn: Ceylonite, pleonaste]

Definition of 'ceylonite'

From: GCIDE
  • Ceylanite \Cey"lan*ite\, n. [F., fr. Ceylan Ceylon.] (Min.) A dingy blue, or grayish black, variety of spinel. It is also called pleonaste. [Written also ceylonite.] [1913 Webster]