- of or relating 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, denoting, or formed in the third period of the Palaeozoic era, between the Ordovician and Devonian periods, which lasted for 25 million years, during which fishes first appeared
- of or relating to the Silures
- the Silurian period or rock system
