Jurassic is an adjective and noun related to the period of Earth's history between about 201 and 145 million years ago, or to its fossil record and organisms. In common usage, it often appears as a playful or thematic label (e.g., 'Jurassic Park'), or to describe something ancient or prehistoric with a cinematic tone. It also denotes the third period of the Mesozoic era in formal geology contexts.
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