n. An iron oxyhydroxide that is the main constituent of rust
the GNU version of the Collaborative International Dictionary of English
n. an oxide of iron.
The Century Dictionary and Cyclopedia
n. A hydrous oxid of iron, occurring in orthorhombic crystals, also massive. It is found with other ores of iron, for example hematite or limonite, as at the Lake Superior mines.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a red or yellow or brown mineral; an oxide of iron that is a common constituent of rust
Word Usage
"Low goethite: Mineralogical studies of the bauxite suggest that abundances of the problematic iron hydroxide mineral species called goethite are very low to absent."