mental age

n. (Abbr. MA)
A measure of mental development as determined by intelligence tests, generally restricted to children and persons with intellectual impairment and expressed as the age at which that level of development is typically attained.

A measure of an individual's level of intellectual development: for example, a person with a mental age of 5 years will function intellectually at the same level as an average 5-year-old child.

n. (Abbr. MA, M.A.)

A measure of mental development as determined by intelligence tests, generally restricted to children and expressed as the age at which that level is typically attained.

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The noun has one meaning:

Meaning #1: the level of intellectual development as measured by an intelligence test

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