Jurassic, ca.
(Of Juramountain range of France).
1. adj. Géol. Said of the second period of the Mesozoic era, spanning from ago 208 million years ago to 144 million years ago, marked by the heyday of the dinosaurs and the emergence of mammals and birds. U t. c. s. m.
OrRTOGR. ESCR. with may. initial c. s.
