sexagenary
1 of 2adjective
sex·ag·e·nary
(ˈ)sek¦sajənerē,
-ri
1
: of, relating to, or based on the number 60
2
: sexagenarian
sexagenary
2 of 2noun
"
plural -es
1
: sexagesimal
2
: sexagenarian
Word History
Etymology
Adjective
Latin sexagenarius containing or consisting of sixty, from sexageni sixty each (from sexaginta sixty, irregular—influence of quadraginta forty—from sex six + -ginta —akin to Latin -ginti in viginti twenty) + -arius -ary