What is the technical term for a natural nail?

The technical term for a natural nail is "onyx." This term comes from the Greek word meaning "fingernail" or "claw," and it specifically refers to the hard, protective covering on the top of the digits (fingers and toes) made primarily of keratin, a protein that also makes up hair and skin. Understanding the terminology associated with nails is crucial for students in cosmetology, as it encompasses knowledge on nail structure, health, and proper care techniques.

The other terms listed have different meanings: "onychia" refers to inflammation of the nail, "lentigens" are small pigmented lesions on the skin, and "hyperhidrosis" is a condition characterized by excessive sweating. These distinctions are important in a broader context of cosmetology, particularly when discussing nail care and overall aesthetics.