quingenary
/kwɪnˈdʒiːn(ə)ri/ /kwɪnˈdʒɛn(ə)ri/ /ˈkwɪndʒɪn(ə)ri/noun
= quincentenary rare.
adjective
Roman History. Consisting of five hundred men; accommodating or designed for a unit of five hundred men.
Origin
Early 20th century; earliest use found in The Times. From classical Latin quīngēnārius consisting of five hundred men, weighing five hundred pounds from quīngēnī five hundred each + -ārius.