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n. Abbr. MA
A measure of intellectual development as determined by an intelligence test, expressed as the age at which that test score is typically attained. It was formerly used in calculating intelligence quotients but is now generally used only for children and people with intellectual disability.
(Psychology) psychol the mental ability of a child, expressed in years and based on a comparison of his test performance with the performance of children with a range of chronological ages. See also intelligence quotient
the level of mental ability of an individual, usu. a child, expressed as the chronological age of the average individual at this level of ability, as determined by an intelligence test.