amu

This term is a specialized scientific unit used exclusively in chemistry and physics to describe the mass of atoms and molecules. It is a technical shorthand that allows scientists to avoid using extremely small numbers in kilograms or grams when discussing atomic weights.

In modern scientific literature, the term "amu" has been largely superseded by the "unified atomic mass unit" (u) or the "dalton" (Da). While "amu" remains common in introductory textbooks, professional research typically employs the dalton to ensure precision and standardization across international scientific bodies.