chronological age

noun Psychology.
  1. the number of years a person has lived, especially when used as a standard against which to measure behavior, intelligence, etc.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

chronological age in Medicine

chronological age

[krŏn′ə-lŏjĭ-kəl]
n.
  1. 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.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.