The sharp horny nail with which the feet of birds and some beasts are armed. Also applied to similar structures on the feet of insects…

Each of the digits of the foot of a beast or bird.

The flat, padded part of the foot (esp. the forefoot) of a quadruped. In later use also occasionally: a broad grasping surface on a bird's foot, a…

The foot of an animal having claws and pads. Also: the hand of a monkey or ape.

The hallux or hinder claw of a bird. Obsolete.

Zoology. A sharp, hard process or projection on the tarsus of the domestic cock and certain other fowls and birds; a back-claw.

In other vertebrate animals. In a bird, esp. a gamecock or lark: the hind toe (hallux); = spur, n.1 5a. Cf. heel spur, n. 3. Also: a metal spur…

A pointed process or projection on the heel of certain male animals. Also: the hind toe (hallux) of a gamecock (cf. heel, n.1 2a(c)). Cf. spur, n.1…

a claw borne by a digit of the wing in certain birds.

General use as a modifier with the sense ‘of, involving, or relating to birds’, as in bird book, bird chorus, bird claw, bird flight, bird migration…