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1. the duration, or the measure of time of the existence of a person or object.
2. to undergo change as a result of passage of time.
achievement age a measure of achievement expressed in terms of the chronologic age of a normal child showing the same degree of attainment.
chronologic age the actual measure of time elapsed since a person's birth.
1. age estimated from the degree of anatomical development.
2. in psychology, the age of an individual determined by degree of emotional, mental, anatomical, and physiological maturation.
gestational age see gestational age.
mental age the age level of mental ability of a person as gauged by standard intelligence tests.
men·tal age (MA),
a measure, expressed in years and months, of a child's intelligence relative to age norms as determined by testing with the Stanford-Binet intelligence scale.
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.
men·tal age(MA) (men'tăl āj)
A measure, expressed in years and months, of a child's intelligence relative to age norms as determined by testing with the Stanford-Binet intelligence scale.