pachycephalosaur
美 [pækaɪ'kɛfələzɔr]
英 [pækaɪ'kefələzɔ:r]
- 网络肿头龙；厚头龙；肿头龙类
复数：pachycephalosaurs
n. | 1. a plant-eating dinosaur of the late Cretaceous and Jurassic periods that walked on its hind legs and had a very thick skull covered with knobs or spikes. |