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# cambrian

«cambrian» in Mova's school dictionary: **The Cambrian was a period of Earth's history about 540 to…** — its meaning for a pupil, its sense in the lessons and examples, with 1 sentence of Mova's corpora that use it.

### part of speech

adjective (Cambrian); noun (the Cambrian)

### meaning for a pupil

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://md.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://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cambrian/#m2)

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

### In the corpora

- [About 540 million years ago, many animal groups with shells, eyes and legs appeared fairly quickly, in the Cambrian explosion.](https://md.mova.elamur.ai/free/en/corpora/school/geography/58-deep-time-and-the-story-of-life/13/)

### Trees and pragmatics

[Every meaning and example of «cambrian» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/cambrian/), each sentence with its dependency tree and frames.