achievement age

noun Psychology.
  1. the level of educational development of an individual as determined by an achievement test and based on a comparison of the examinee's score with the average score of individuals of the same chronological age.
Compare mental age.

Origin of achievement age

First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for achievement age

achievement age

noun
  1. psychol the age at which a child should be able to perform a standardized test successfullyCompare mental age
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

achievement age in Medicine

achievement age

[ə-chēvmənt]
n.
  1. The level of an individual's educational accomplishment as measured by standard achievement tests and expressed as the age in years of a child for whom the total score would be an average score.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.