from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An orthorhombic-disphenoidal mineral containing hydrogen, nickel, oxygen, and sulfur.
from The Century Dictionary and Cyclopedia
- n. Hydrous nickel sulphate, NiSO4+7H2O, usually occurring in fibrous forms or as an efflorescence of a green color. It results from the alteration of nickel ores.