Min. Obs. [f. Gr. εὐ- (see EU-) + χύ-σις melting (f. χέ-ειν to melt) + σίδηρ-ος iron + -ITE.] A variety of augite; = PYROXENE.
1823. W. Phillips, Min., 62. Euchysiderite … may be considered as an augite, of which iron enters into the composition in an uncommon degree.
