pentadactyl /ˌpɛntəˈdæktɪl/

• 1. 

  ADJ (of the limbs of amphibians, reptiles, birds, and mammals) consisting of an upper arm or thigh, a forearm or shank, and a hand or foot bearing five digits (两栖动物、爬行动物、鸟、哺乳动物肢体)有五指或趾的