Ångström is a unit of measurement for length, used in the field of atomic-scale physics. It is defined as one-tenth of a nanometer or 0.1 nanometers. However, there are several other terms that are commonly used as synonyms for angstrom in various fields. These include the nanometer (nm), picometer (pm), femtometer (fm) and micrometer (μm). Each of these units is used to express extremely small measurements in various scientific or industrial contexts. While angstrom remains a well-known and widely-used unit of measurement, the availability of alternative measurements allows for flexibility in scientific research and experimentation.