- Relative intelligence of an individual expressed as a score on a standardized test of intelligence. Consider also intelligence.
Definition from: Psychological Index Terms via Unified Medical Language System at the National Library of Medicine
- A number used to express the apparent relative intelligence of a person: as A: the ratio of the mental age (as reported on a standardized test) to the chronological age multiplied by 100. B: a score determined by one's performance on a standardized intelligence test relative to the average performance of others of the same age.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
See also Understanding Medical Terminology.