Dictionary De - En
De - Es
De - Pt| English Dictionary: dioptase | by the DICT Development Group |
| 1 result for dioptase | |
| From Webster's Revised Unabridged Dictionary (1913) [web1913]: | |
|
Dioptase \Di*op"tase\, n. [Gr. [?] = dia` through + [?] to see: cf. F. dioptase.] (Min.) A hydrous silicate of copper, occurring in emerald-green crystals. | |
