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silurian |
Grep of noun silurian silurian silurian period Overview of noun silurian The noun silurian has 1 sense (no senses from tagged texts) 1. Silurian, Silurian period -- (from 405 million to 425 million years ago; first air-breathing animals) Overview of noun silurian The noun silurian has 1 sense (no senses from tagged texts) 1. Silurian, Silurian period -- (from 405 million to 425 million years ago; first air-breathing animals)
silurian definition