opposable
4.chiefly diurnal carnivorous birds having hooked beaks and long talons with opposable hind toe: falcons; hawks; eagles; ospreys; caracaras; vultures.
5.The short thick digit of the human hand, next to the index finger and opposable to each of the other four digits.
6.The terminal part of the human arm located below the forearm, used for grasping and holding and consisting of the wrist, palm, four fingers, and an opposable thumb.

