Designating or pertaining to a period of the Mesozoic era, characterized by the existence of dinosaurs and the appearance of flying reptiles and birds.

【地】侏罗纪的。

The Jurassic period.

侏罗纪(系)。中生代(Mesozoic)的第二纪，距今约两亿一千万─一亿四千万年前。爬虫类中的恐龙很繁盛，此时大型的恐龙和在空中飞行的翼龙出现了。最古老的鸟类─始祖鸟也出现了。