nonagenarian
noun/ˌnɒnədʒəˈneəriən/, /ˌnəʊnədʒəˈneəriən/
/ˌnəʊnədʒəˈneriən/, /ˌnɑːnədʒəˈneriən/
- a person who is between 90 and 99 years oldWord Originearly 19th cent.: from Latin nonagenarius (based on nonaginta ‘ninety’) + -an.
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nonagenarian