- a very common mineral, iron hydroxide, HFeO2, occurring in crystals, but more commonly in yellow or brown earthy masses: an ore of iron.
Origin of goethite
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a black, brown, or yellow mineral consisting of hydrated iron oxide in the form of orthorhombic crystals or fibrous masses. Formula: FeO(OH)
C19: named after Goethe