"Ferrous" refers to materials that contain iron, particularly in its +2 oxidation state. This term is commonly used in chemistry and metallurgy to describe iron-based compounds and alloys. Ferrous materials are known for their magnetic properties and are often used in construction and manufacturing due to their strength and durability. In contrast, "ferric" refers to iron in its +3 oxidation state. Ferrous compounds, such as ferrous sulfate and ferrous oxide, are important in various applications, including fertilizers and pigments. Understanding the difference between ferrous and ferric is essential in fields like chemistry and materials science.