quincentenary

n. 第五百周年
a. 第五百周年的

quin.cen.ten.a.ry

n.（名词）
pl. quin.cen.ten.a.ries
A 500th anniversary or celebration.
五百周年：五百年纪念日或是庆祝活动
adj.（形容词）
Of or relating to a span of 500 years or to a 500th anniversary.
五百周年纪念的：属于或是关于满五百年或是迎接第五百年的纪念日的

来源：
From Latin quongento, quoncento [five hundred] on the model of such words as tercentenary * see penk we
From Latin quongento, quoncento [five hundred] on the model of such words as tercentenary *参见 penk we