dimetrodon

/dahy-me-truh-don/US // daɪˈmɛ trəˌdɒn //

二甲龙,二甲虫,二甲醚,二甲子龙

Definitions

n.名词 noun

1
- : an extinct carnivorous mammallike reptile, of the genus Dimetrodon, dominant in North America during the Permian Period, up to 10 feet (3.1 meters long and usually bearing spinal sails.

The adductor musculature of the lower jaw in Dimetrodon was divided into lateral and medial groups (Figs. 5, 6).
Thrinaxodon represents an advance beyond Dimetrodon in several respects.
A similar origin suggests itself for the corresponding muscle, the second major adductor mass, in Dimetrodon.
The dentition of Dimetrodon further substantiates the movement of the jaw in a simple up and down direction.
Watson believed that the jaw of Dimetrodon was capable of anteroposterior sliding.