爪（Claw），又稱爪子或鉤爪，是羊膜动物（哺乳類、鳥類及爬蟲類）於手指及腳趾末端的表皮角質層附加物。
File:Cat claw closeup.jpg|貓爪
File:GoldenEagleFootLyd4.png|強大的金雕爪
File:Harpia harpyja 001 800.jpg|角雕爪，抓住老鼠
参考资料
- Maddin & al. (2009): The anatomy and development of the claws ofXenopus laevis (Lissamphibia: Anura) reveal alternate pathways of structural evolution in the integument of tetrapods. Journal of Anatomy, no 214 (4): pp 607-19 [http://www.ncbi.nlm.nih.gov/pubmed/19422431 Abstract]
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