SIDER

Sider is a term that appears in several distinct domains. As a linguistic root, sider- derives from the Greek sideros meaning iron and, in some contexts, from Latin sidus meaning star; it functions as a combining form rather than a stand-alone word. It is most common in scientific terminology related to iron and ferrous compounds, metallurgy, and mineralogy.

In mineralogy and geochemistry, siderite is an iron carbonate mineral (FeCO3), and siderophile refers to elements with a strong affinity for iron, which leads them to partition into metallic iron during planetary formation. Related terms include siderurgy, the science of extracting and working iron, and siderotic processes describing iron-related deposition or staining. The root also appears in siderosis, a condition caused by inhalation of iron particles, and in other iron-related phenomena.

In pharmacology, SIDER (Side Effect Resource) is a public database that catalogs reported adverse drug reactions for marketed medicines. It aggregates information from drug labels and public biomedical sources to support research in drug safety, pharmacovigilance, and computational drug discovery. The database is used to map drugs to potential side effects and to study patterns across therapeutic classes.

Sider is also a surname. It appears in various cultures and languages, and as with many surnames its origins and meanings can vary. In some cases it may be transliterated from names with similar phonetics in different alphabets.