Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
geological era | Yes | No | No | No |
Paleozoic era | Yes | No | No | No |
geological era (noun) | Paleozoic era (noun) |
---|---|
a major division of geological time; an era is usually divided into two or more periods | from 544 million to about 230 million years ago |