生せい活かつ年ねん齢れいせいかつねんれいじ字FuriganaMeanings1nounchronological ageTechnical term used in medicine, psychology, and developmental studies to refer to age measured from birth, often contrasted with mental age or developmental age. Cross-referenced with 暦年齢, a synonym.See also: 暦年齢生せい活かつ年ねん齢れいは暦れき年ねん齢れいと