In the warm daylight, Steve looked even older than the twenty-six years that was his chronological age.
Our killer—no matter what his chronological age—does not think like an adult.
He had given his name as Steve Donnell, his date of birth as 3576, his chronological age as seventeen.
It is an actual fact that the chronological age of an individual need not have much to do with his physical age.
The intelligence quotient (often designated as I Q) is the ratio of mental age to chronological age.
The mental age of a subject is meaningless if considered apart from chronological age.
If a child's mental age is the same as his chronological age, he is just average, neither bright nor dull.
chronological age chron·o·log·i·cal age (krŏn'ə-lŏj'ĭ-kəl)
Abbr. CA, C.A.
The number of years a person has lived, used especially in psychometrics as a standard against which certain variables, such as behavior and intelligence, are measured.