Found 2 items, similar to Pleonaste.
English → English (WordNet) Definition: pleonaste pleonaste n : a dark-colored spinel containing iron [syn: Ceylonite]
English → English (gcide) Definition: Pleonaste Pleonaste \Ple"o*naste\, n. [Gr.? abundant, rich; cf. F. pl['e]onaste.] (Min.) A black variety of spinel. [1913 Webster]