Claw
A claw was a relatively long, sharp piece of keratin at the end of the an animal's feet or paws, similar to s. Species with claws generally used them to either kill prey, hold onto things, attack, or a combination thereof. Attacking with claws was called scratching or clawing.

When William T. Riker was trying to feed Spot, she scratched him and he got treated by Beverly Crusher. ()

On the planet of the Sky Spirits, Neelix was attacked by a  that clawed him just above his right eye. ()

Species with claws 
 Cat
 
 Lizard
 Dog

External link

Anatomy