- ADD - attention deficit disorder
- minimal brain dysfunction
- A disorder characterized by persistent developmentally inappropriate inattention and impulsivity.
Definition from: Psychological Index Terms via Unified Medical Language System at the National Library of Medicine
- A syndrome of disordered learning and disruptive behavior that is not caused by any serious underlying physical or mental disorder and that has several subtypes characterized primarily by symptoms of inattentiveness or primarily by symptoms of hyperactivity and impulsive behavior (as in speaking out of turn) or by the significant expression of all three -- abbreviation ADD; called also minimal brain dysfunction.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
See also Understanding Medical Terminology.