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| Si·lu·ri·an [ si lree ən, sī lree ən ] (plural Si·lu·ri·ans) |
noun |
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| Definition: |
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1. geologic period: the period of geologic time, 435 million to 410 million years ago, during which the first air-breathing animal and land plants appeared
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2. member of Silures: a member of the Silures
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| [Early 18th century. < Latin Silures; from the discovery of rocks of this period in SE Wales, home of the ancient people the Silures] |
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 Si·lu·ri·an adjective |
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