Webster’s Revised Unabridged Dictionary · 1913 Sphalerite Sphal′er·ite (sfăl′ẽr·īt), n. [Gr. σφαλερός slippery, uncertain. See Blende.] (Min.) Zinc sulphide; — called also blende, black-jack, false galena, etc. See Blende (a). ‹ Sphagnum Sphene ›