| Part of Speech | Definition | |
| Noun | 1. From 345 million to 280 million years ago.[Wordnet]. | |
Source: WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | Top | |
Common Expressions: Carboniferous period
| Expressions | Definition | ||
| Carboniferous period | From 345 million to 280 million years ago. Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | ||
| Lower Carboniferous period | From 345 million to 310 million years ago; increase of land areas; primitive ammonites; winged insects. Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | ||
| Upper Carboniferous period | From 310 million to 280 million years ago; warm climate; swampy land. Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | ||
Source: compiled by the editor from various references; see credits. | Top | ||
