Jurassic

adjective

Ju·​ras·​sic ju̇-ˈra-sik 

: of, relating to, or being the period of the Mesozoic era between the Triassic and the Cretaceous or the corresponding system of rocks marked by the presence of dinosaurs and the first appearance of birds see Geologic Time Table

Jurassic noun

Word History

Etymology

French jurassique, from Jura mountain range

First Known Use

1831, in the meaning defined above

Kids Definition

Jurassic

adjective

Ju·​ras·​sic ju̇-ˈras-ik 

: of, relating to, or being a period of the Mesozoic era of geological history marked by the presence of dinosaurs and the first appearance of birds

also : relating to the corresponding system of rocks see geologic time

Jurassic noun

Etymology

from French jurassique "Jurassic," from Jura, a range of mountains between France and Switzerland formed from the limestone characteristic of this period