(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

(anatomy) The structure consisting of hair, hair follicle, arrector pili muscle and sebaceous gland.

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

(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.

(chemistry) A specific arrangement of atoms that repeats within a macromolecule / (genetics) A specific sequence of bases that repeats within a nucleic acid (or of amino acids within a protein)

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

(geometry) A circle of radius 1. / (trigonometry, the unit circle) The circle of radius 1 with centre at the origin, used in defining trigonometric functions.

Any simple step in a multi-step chemical engineering process; examples include distillation, evaporation, mixing, filtration, crystallization etc.

A unit of measurement which is not itself defined in terms of other units, and from which other units may be derived. / The main unit of a computer or hi-fi system.