1. nail (e.g. fingernail, toenail); claw; talon; hoof
2. plectrum; pick
3. hook; clasp
Wikipedia definition
4. Nail (anatomy)A nail is a horn-like envelope covering the dorsal aspect of the terminal phalanges of fingers and toes in humans, most non-human primates, and a few other mammals. Nails are similar to claws, which are found on numerous other animals. Fingernails and toenails are made of a tough protein called keratin, as are animals' hooves and horns. The mammalian nail, claw, and hoof are all examples of unguis [plural ungues].
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