quinquagenarian

/ˌkwɪŋkwəd͡ʒəˈnɛɹiən/

quinquagenarian · adj — of or related to command over 50 men.

Definition from Wiktionary (CC BY-SA 3.0).

quinquagenarian is pronounced /ˌkwɪŋkwəd͡ʒəˈnɛɹiən/.

Etymology

From Latin quinquāgēnārius (“containing 50”) + -an, either directly or via French quinquagénaire, from Latin quīnquāgēnus (“50 each”) + -ārius (“-ary”), from quīnquāgintā (“five tens, fifty”). Cognate with quinquagenary.

adj

Of or related to command over 50 men.
Of or related to fiftysomethings.

noun

Synonym of pentecoster: an officer who commands 50 men.
Synonym of fiftysomething: a person between 50 and 59 years old.

Definitions & examples from Wiktionary (CC BY-SA 3.0).