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

1 sense of permian period

Sense 1
Permian, Permian period -- (from 280 million to 230 million years ago; reptiles)
       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")