It is another way of calling the metal sprocket of a bicycle where the chain slides.
SPROCKET: In firearms, piece in which lies the key PIN when to shoot.
SPROCKET: Seed of pine, of different size depending on the species, ellipsoidal, with three obtuse edge, woody cover and white almond, sweet and edible in the stone pine.
SPROCKET: Donkey, donkey more back of the recua in which tends to be mounted to the carrier.
SPROCKET: Last of the wings of the bird bone.