unguis

noun4

1. •
   The nail, claw, talon, or hoof of a finger, toe, or other appendage.
2. •
   One of the terminal hooks on the foot of an insect.
3. •
   The slender base of a petal in some flowers; a claw; an ungula.
4. •
   (historical) An old measure equal to the length of the nail of the little finger.