Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun silurian

1 sense of silurian

Sense 1
Silurian, Silurian period -- (from 425 million to 405 million years ago; first air-breathing animals)
       INSTANCE OF=> period, geological period -- (a unit of geological time during which a system of rocks formed; "ganoid fishes swarmed during the earlier geological periods")