permian

(noun, adjective)

adjective

1. Pertaining tp the Perm region of Russia, or its inhabitants. [from 18th c.]

2. Pertaining to their language; Permic. [from 18th c.]

3. (geology) Pertaining to the last geologic period of the Paleozoic era; comprising the Cisuralian, Guadalupian and Lopingian epochs from about 280 to 248 million years ago. [from 19th c.]

noun

1. from 280 million to 230 million years ago; reptiles

Definition categories: time