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sexagenary

adjective
sex·​ag·​e·​nary | \(ˈ)sek¦sajənerē, -ri\

Definition of sexagenary 

(Entry 1 of 2)

1 : of, relating to, or based on the number 60

2 : sexagenarian

sexagenary

noun
\"\
plural -es

Definition of sexagenary (Entry 2 of 2)

1 : sexagesimal

2 : sexagenarian

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History and Etymology for sexagenary

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

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