defined jerroso is incorrectly written and should be written as "ferrous" being its meaning:
Adjective meaning containing iron such as siderite or ferrous carbonate, latin: ferrum ferri ( 41 iron; and the suffix - bear designating a compound of iron in that it used lower Valence chemistry. I still remember the mnemonic of the ancient teachers of chemistry for the correspondence between acids and salts: when the - bear plays p-ito, per-ico plays the silb - ato.
