| Part of Speech | Definition | |
| Noun | 1. From 544 million to about 500 million years ago; marine invertebrates.[Wordnet]. | |
Source: WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | Top | |
Common Expressions: Cambrian period
| Expressions | Definition | ||
| Cambrian period | From 544 million to about 500 million years ago; marine invertebrates. Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | ||
Source: compiled by the editor from various references; see credits. | Top | ||
Specialty Expressions: Cambrian period
| Expressions | Domain | Definition | |
| Cambrian period | Aerospace | A geological period 0.6-0.5 billion years ago during which life on Earth became diverse and complex. Cambrian rocks contain the oldest easily identifiable fossils. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
