aetatis; ae., aet.; aetatis suae Aged; of age; in the year of his (or her) age. These terms are shortened versions of the more proper anno aetatis suae, 'In the year of his/her age.'. Frequently found abbreviated on old tombstones, it appears variously as A.A.S., A.S., and most commonly aet; for example, if someone died in his 41st year, the marke...
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http://www.wordinfo.info/words/index/info/view_unit/3055/12
at the age of.
Found on
https://www.infoplease.com/dictionary/aet
No exact match found.
