/si loor"ee euhn, suy-/ , adj.
1. of or pertaining to the Silures or their country.
2. Geol. 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. See table under geologic time .
n.
3. Geol. the Silurian Period or System of rocks.
[ 1700-10; SILUR(ES) + -IAN ]