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1. (adj.) Jurassic
of or pertaining to a geologic period of the Mesozoic Era, from 190 million to 140 million years ago, characterized by the presence of dinosaurs and the advent of birds and mammals.
2. (n.) Jurassic
the Jurassic Period or System.
Etymology: (1825–35; Jur (a ) +-assic; cf. F jurassique)
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| Definition of 'Jurassic' |
Princeton's WordNet |
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1. (adj) Jurassic, Jurassic period
from 190 million to 135 million years ago; dinosaurs; conifers
2. (adj) Jurassic
of or relating to or denoting the second period of the Mesozoic era
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| Definition of 'Jurassic' |
Webster Dictionary |
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1. (adj) Jurassic
of the age of the middle Mesozoic, including, as divided in England and Europe, the Lias, Oolite, and Wealden; -- named from certain rocks of the Jura mountains
2. (noun) Jurassic
the Jurassic period or formation; -- called also the Jura
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Definitions of Jurassic 
