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Definition of: Silurian
(si·l
r′ē·ən, sī-) adjective
1. Geol. Of or pertaining to the period or rock system of the Paleozoic era following the Ordovician and preceding the Devonian, sometimes called the era of invertebrates: so called because first identified in southern Wales, the home of the ancient Silures.
2. Of or pertaining to the Silures.
—noun
1. The Silurian period or system.
2. Originally, the period between the Cambrian and the Devonian.
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