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

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# pachycephalosaurus

noun (Pachycephalosaurus, pachycephalosauruses)

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

## Everyday

Pachycephalosaurus was a plant-eating dinosaur with a very thick, dome-shaped skull, which lived in North America about 66 million years ago. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/P/pachycephalosaurus/#m1)

### In the lessons

Met in science and dinosaur books; its name means «thick-headed lizard». Scientists argue about whether it head-butted others.

### Examples

- Pachycephalosaurus had a skull 25 centimetres thick. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/P/pachycephalosaurus/#x1)
- Its name means «thick-headed lizard». [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/P/pachycephalosaurus/#x2)
- Pachycephalosaurus walked on two legs. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/P/pachycephalosaurus/#x3)
- It lived at the same time as T. rex. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/P/pachycephalosaurus/#x4)
- Some scientists think Pachycephalosaurus butted heads like goats. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/P/pachycephalosaurus/#x5)
- Its dome was ringed with bony knobs. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/P/pachycephalosaurus/#x6)

### Note

Say «PAK-ee-SEF-uh-low-SAW-rus». Name of a dinosaur, often written with a capital P. Whether it head-butted is still argued; do not state it as fact.

## On Mova

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