名詞 centennial:

1. the 100th anniversary (or the celebration of it)
   同義詞：centenary

形容詞 centennial:

1. of or relating to or completing a period of 100 years
   同義詞：centenary

cen.ten.ni.al

adj.（形容詞）
Of or relating to an age or period of 00 years.
世紀的：屬于或關(guān)于一百年的時間或時期的
Occurring once every 00 years:
百年一次的：
例句：
a centennial commemoration.
百年紀念

Of or relating to a 00th anniversary.
百年紀念的：屬于或關(guān)于百年紀念的
n.（名詞）
A 00th anniversary or a celebration of it.
百周年紀念：百周年紀念或百周年慶祝

來源：
Latin centum [hundred] * see dekô
拉丁語 centum [一百] *參見 dekô
(bi)ennial
(bi)ennial

【引伸】
centen.nially
adv.（副詞）