A red or yellow or brown mineral

• An oxide of iron that is a common constituent of rust

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
goethite \goethite\ n. (Miner.) an oxide of iron. Syn: gothite.

WordNet Word definitions in WordNet
n. a red or yellow or brown mineral; an oxide of iron that is a common constituent of rust [syn: gothite ]

Wiktionary Word definitions in Wiktionary
n. (context mineral English) An iron oxyhydroxide that is the main constituent of rust.

Wikipedia Word definitions in Wikipedia
Goethite (FeO(OH)), named after the German polymath and poet Johann Wolfgang von Goethe (1749–1832), an iron bearing hydroxide mineral of the diaspore group, is found in soil and other low-temperature environments. Goethite has been well known since ancient ...