Nonagenarian
/ˌnɒn.ə.dʒəˈneə.ri.ən/noun
A person who is 90 to 99 years old.
Did you know?It descends from the Latin adjective nonagenarius, built from nonaginta, meaning “ninety,” so the word is basically a precise Roman age-label rather than a mystical term.
Etymological Timeline
Latin
Latin
nonagenarius
“pertaining to ninety; ninety years old”
Latin
Latin
nonaginta
“ninety”
Proto-Indo-European
PIE
*newn̥
“nine”
Late Latin
Latin
nonagenarius
“a person or thing associated with ninety”
16th Century
English
nonagenarie
“a person aged ninety years or more”
Modern English
English
nonagenarian
“a person in their nineties”