SILURIAN
- formed in the third period of the Palaeozoic era [adj]
- of or pertaining to the Silures or their country
- noting or pertaining to a period of the Paleozoic Era, occurring from 425 to 405 million years ago, notable for the advent of air-breathing animals and terrestrial plants
- the Silurian Period or System of rocks
- of or pertaining to a certain geologic time period [adj]
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