[Elamur Dictionary](https://md.dictionary.elamur.ai/free/en/) · [this page in HTML](https://dictionary.elamur.ai/free/en/english/cambrian/)

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# cambrian

adjective (Cambrian); noun (the Cambrian)

«cambrian» in the English dictionary: everyday — its meanings, how the lessons use it, and examples, each with its tree on Mova.

## Everyday

1. (science) The Cambrian was a period of Earth's history about 540 to 485 million years ago, when many kinds of animals with hard shells first appeared in the sea. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/cambrian/#m1)
2. Cambrian means to do with Wales, as in the Cambrian Mountains, from Cambria, the Latin name for Wales. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/cambrian/#m2)

### In the lessons

In science lessons about fossils and evolution, the Cambrian explosion was when many animal groups appeared quickly; trilobites are famous Cambrian fossils. The period was named after rocks studied in Wales. In geography, the Cambrian Mountains run through mid-Wales, and the Cambrian Line is a railway.

### Examples

- Trilobites lived in Cambrian seas. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/cambrian/#x1)
- Many animal groups appeared in the Cambrian explosion. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/cambrian/#x2)
- There were no animals on land in the Cambrian. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/cambrian/#x3)
- The Cambrian period is named after Wales. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/cambrian/#x4)
- We hiked in the Cambrian Mountains. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/cambrian/#x5)
- Cambrian rocks contain early fossils. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/cambrian/#x6)

### Note

Capital C. Said KAM-bree-un. Before the Cambrian came the Precambrian; after it came the Ordovician. No dinosaurs lived then; they came hundreds of millions of years later.

## On Mova

- [Trees and pragmatics of «cambrian» in the school dictionary](https://mova.elamur.ai/free/en/corpora/dictionaries/school/C/cambrian/): every meaning and example parsed by Mova, with its dependency tree and frames.
- [«cambrian» in the school dictionary](https://mova.elamur.ai/free/en/dictionaries/school/w/cambrian.html) on Mova free.