(In the SI system of units) Any unit derived from one of the seven base units of length (meter), mass (kilogram), time (second), electric current (ampere), thermodynamic temperature (kelvin), amount of substance (mole) and luminous intensity (candela).

(military) A type of military unit armed, equipped and trained to fight in rugged, mountainous terrain.

(linear algebra) An identity matrix

Any standardized, reproducible unit that can be used to measure any physical property.

A unit of form, organization or arrangement of any size.

(chemistry) The basic structural unit of a polymer; the monomer unit which has been polymerized.

Any division of quantity accepted as a standard of measurement or exchange; a unit of measure.

(cinematography) The team that shoots footage which is of primary importance for the final cut of the motion picture, including all scenes involving actors, or at least stars of the motion picture.

(US) any unit of measurement that is currently used in the United States / any traditional unit of measurement that is used by custom

(cinematography) A separate team that shoots footage that is of secondary importance for the final cut of the motion picture, as opposed to first unit.