caliche

caliche [cah-lee’-chay]
noun
1Pebble or small piece of limestone accidentally introduced into a brick or tile at the time of its being burnt. (m)
2A crust of lime which flakes from a wall. (m)
3(Peru and Chile) Native saltpeter, or crude sodium nitrate. (m)

caliche
sustantivo:masculino
1 (Latinoamérica) saltpetre bed; caliche; (terreno) nitrate-bearing ground
2 (S. Cone) (jalbegue) crust of whitewash which flakes from a wall
3
echar un caliche (vulgar) to have a screw; (vulgar)