age (āj)
1. the duration, or the measure of time, of the existence of a person or object.
2. the measure of an attribute relative to the chronological age of an average normal individual.
achievement age the age of a person expressed as the chronologic age of a normal person showing the same proficiency in study.
bone age osseous development shown radiographically, stated in terms of the chronological age at which the development is ordinarily attained.
chronological age the measure of time elapsed since a person's birth.
fertilization age the age of a conceptus defined by the time elapsed since fertilization.
gestational age the age of a conceptus or pregnancy; in human clinical practice, timed from onset of the last normal menstrual period. Elsewhere the onset may be timed from estrus, coitus, artificial insemination, vaginal plug formation, fertilization, or implantation.
mental age the age level of mental ability of a person as gauged by standard intelligence tests.
chron·o·log·i·cal age (kr n  -lj  -kl)n. Abbr. CA 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. |
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