tetrapod

/te-truh-pod/US // ˈtɛ trəˌpɒd //UK // (ˈtɛtrəˌpɒd) //

四足动物,四肢动物,四体动物,四肢动物类

Definitions

n.名词 noun

1
- : any vertebrate having four limbs or, as in the snake and whale, having had four-limbed ancestors.
- : an object, as a caltrop, having four projections radiating from one central node, with each forming an angle of 120° with any other, so that no matter how the object is placed on a relatively flat surface, three of the projections will form a supporting tripod and the fourth will point directly upward.

adj.形容词 adjective

Sometime in the steamy mid-Devonian, a family of those fish followed plants and bugs onto land and became the first tetrapods, or four-legged vertebrates.
The study reconstructed the family tree of early tetrapods to piece together that critical period.
By analyzing genes with transposon signatures from nearly 600 tetrapods, the researchers found 106 distinct genes that may have fused with a transposon.
Contributions to the question of the origin of the tetrapod limb.
Tetrapod, tet′ra-pod, n. an insect distinguished by having but four perfect legs.