*adobe*

‖n. [ Sp. ] 1. An unburnt brick dried in the sun; also used as an adjective, as, an adobe house, in Texas or New Mexico. [ 1913 Webster ]

2. Earth from which unburnt bricks are made. [ Western U. S. ] [ Webster 1913 Suppl. ]

3. (Geol.) Alluvial and playa clays of desert and arid regions, differing from ordinary clays of humid regions in containing carbonates and other soluble minerals. [ Webster 1913 Suppl. ]