| physical age | The age in terms of structure rather than of function or of passage of time. Synonym: physical age. (05 Mar 2000) |
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| physiologic age | Age estimated in terms of function. (05 Mar 2000) |
| small for gestational age | <obstetrics, paediatrics> A weight classification of newborns associated with poor health outcomes, the weight falling below the 10th percentile on the intrauterine growth curve for the infant's calculated gestational age. (27 Sep 1997) |
| developmental age | Age estimated by anatomic development since implantation, the degree of anatomic, physiologic, mental, and emotional maturation. Synonym: foetal age. (05 Mar 2000) |
| infant, small for gestational age | An infant having a birth weight lower than expected for its gestational age. (12 Dec 1998) |
| old age assistance | Financial assistance for the impoverished elderly through public funding of programs, services, and individual income supplements. (12 Dec 1998) |
| emotional age | A measure of emotional maturity by comparison with average emotional development. (05 Mar 2000) |
| foetal age | Age estimated by anatomic development since implantation, the degree of anatomic, physiologic, mental, and emotional maturation. Synonym: foetal age. (05 Mar 2000) |