chronological age

noun

Definition of chronological age 

: the age of a person as measured from birth to a given date His chronological age is five, but his mental age is three—he thinks and behaves like a three-year-old.

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chronological age

noun
chro·​no·​log·​i·​cal age | \ˌkrän-ᵊl-ˌäj-i-kəl-, ˌkrōn- \

Medical Definition of chronological age 

: the age of a person as measured from birth to a given date — compare achievement age

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