(library science) An identification number, usually consisting of a combination of numbers and characters, used to identify and locate materials within a library.

(mathematics) A positive integer that is the product of three distinct prime factors.

Any of a range of European abbreviations for food additives used on labels. / (Britain, Ireland, informal) Any such additive, often regarded as undesirable.

plural of prime number

(rugby) A player in the scrum, who controls the movement of the scrum, and can pick up the ball exiting the scrum; eighthman. / (cricket) The batsman who bats eighth.

(of a picture) Made from a painting by numbers kit. / (figuratively) By rote, without thought or creativity.

To complete a painting by numbers kit / (figuratively) To perform something in the simplest way

A recreation in which a board containing a picture to be painted is made up of numbered areas, each number corresponding to a colour of paint to be applied.

(mathematics) A complex number consisting of more than two square roots of negative one, creating multiple simulated dimensions.

(quantum mechanics) One of certain integers or half-integers that specify the state of a quantum mechanical system (such as an electron in an atom).