Manganoan is a term used to describe minerals that contain manganese. Synonyms for manganoan include manganiferous, manganous, and manganese-rich. These terms are often used interchangeably depending on the context in which they are used. Other words that can be used to describe minerals that contain manganese include pyrolusite, rhodonite, and psilomelane. The use of different terms for manganoan is important in geology and mineralogy because it helps scientists to accurately identify and categorize different minerals and rock formations. Understanding the various synonyms for manganoan is crucial for anyone interested in geology or mineralogy.