n.
Pronunciation: ˌ ī - ' kyü
Function: noun
Etymology: i ntelligence q uotient
Date: 1920
1 : 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
2 : proficiency in or knowledge of a specified subject <nobody questioned his hockey IQ >