Goethite

[gәuθait]

Definition

(noun.) a red or yellow or brown mineral; an oxide of iron that is a common constituent of rust.

Editor: Ned--From WordNet

Definition

(n.) A hydrous oxide of iron, occurring in prismatic crystals, also massive, with a fibrous, reniform, or stalactitic structure. The color varies from yellowish to blackish brown.

Typed by Enid