Jurassic

American  

[joo-ras-ik] / dʒʊˈræs ɪk /

adjective

1. noting or pertaining to a period of the Mesozoic Epoch, occurring from 190 to 140 million years ago and characterized by an abundance of dinosaurs and the advent of birds and mammals.

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noun

1. the Jurassic Period or System.

Jurassic British  

/ dʒʊˈræsɪk /

adjective

1. of, denoting, or formed in the second period of the Mesozoic era, between the Triassic and Cretaceous periods, lasting for 55 million years during which dinosaurs and ammonites flourished

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noun

1. the Jurassic period or rock system

Jurassic Scientific  

/ j-răs′ĭk /

1. The second and middle period of the Mesozoic Era, from about 208 to 144 million years ago. During this time the supercontinent Pangaea continued to split up and numerous shallow seas inundated the new continents. Dinosaurs were the dominant form of terrestrial animal life, and the earliest birds appeared. Marine life was dominated by ammonites and belemnites, and sponges, corals, bryozoa, and gastropods all flourished. Gymnosperms and cycads were the dominant land plants.

2. See Chart at geologic time

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Other Word Forms

• post-Jurassic adjective

Etymology

Origin of Jurassic

First recorded in 1825–35; Jur(a) + -assic, suffix extracted from Triassic; compare French jurassique

Example Sentences

Now we’re on Vegas World; now we’re on Jurassic Planet; now we’re on a planet ruled by a gigantic queen bee.

From The Wall Street Journal • Mar. 31, 2026

"That's your Jurassic Park moment... one to remember for a lifetime."

From Barron's • Feb. 27, 2026

Xfinity saves Jurassic Park from destruction by simply turning a router back on, preventing a cataclysmic security breakdown.

From Slate • Feb. 8, 2026

Using this information, the team reconstructed the Jurassic food web in greater detail than previously achieved for dinosaurs.

From Science Daily • Feb. 1, 2026

All of Jurassic Park could be directly below me, and I’d never get close—not without dynamite.

From "Linked" by Gordon Korman