Cat Claw Close-up

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The pointed, slender and curved structure on the end of a digit (usually a toe). Made from a hard protein, keratin.
Claws of cats are sharp, protractile, and do not usually register in a track.
Dogs' claws are relatively blunt, are non-protractile, and usually register in tracks. They are also known as nails.
Cf. nail, toenail, talon, hoof