sexagenary

[ sek-saj-uh-ner-ee ]
/ sɛkˈsædʒ əˌnɛr i /
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adjective

of or relating to the number 60.
composed of or proceeding by sixties.

noun, plural sex·ag·e·nar·ies.

Origin of sexagenary

1525–35; < Latin sexāgēnārius, equivalent to sexāgēn(ī), distributive of sexāgintā sixty + -ārius -ary
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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