What is the technical term for the nail?

The term "Onyx" refers specifically to the nail and is derived from the Greek word for nail. In the context of anatomy and cosmetics, it is commonly used to describe the hard protective surface that covers the tips of fingers and toes. Understanding this term is crucial for facial specialists, as it emphasizes the significance of nail health in overall aesthetics and personal care.

Other terms presented in the choices refer to different anatomical structures. For instance, "Carina" pertains to the keel-like structures in the body, often relating to parts of the respiratory system. "Unguiculus" also means finger or toenail but is less commonly used in contemporary terminology compared to "Onyx." "Phalanx" refers to the bones in the fingers or toes that are covered by the nails rather than the nails themselves. This establishes "Onyx" as the most precise and widely accepted term for nails in the context of beauty and skin care.