Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
Silurian | Yes | No | No | No |
Paleozoic era | Yes | No | No | No |
Silurian (noun) | Paleozoic era (noun) |
---|---|
the period from 425 million to 405 million years ago; characterized by the first air-breathing animals | from 544 million to about 230 million years ago |