(computing) Created or defined by the user of a system, rather than being included in the original package.

(medicine) The practice of recommending a diagnostic test or medical treatment that is not necessarily the best option for the patient, but mainly serves to protect the physician against a potential malpractice lawsuit from the patient.

(military) The defence of a single object or a limited area, such as a ship or a building.

(crystallography) A type of point defect in crystalline solids, occurring when an atom or smaller ion (usually cation) leaves its place in the lattice, creating a vacancy, and becomes an interstitial by lodging in a nearby location.

(crystallography) A type of point defect in a crystal lattice.

plural of defensive industry

(business) Any industry that fulfils a basic need, such as supplying food, and is thus not greatly affected by market fluctuations.

Alternative form of Petrov Defence

A chess opening beginning 1. e4 e5 2. Nf3 Nf6.

plural of self-defense wound