What is the term for the study of the growth and structure of nails?

The study of the growth and structure of nails is called onychology. This term specifically focuses on the anatomy, growth patterns, and health of nails, as well as nail disorders and conditions. It is essential for professionals in the beauty and health industries, such as nail technicians and dermatologists, to have a strong understanding of onychology to provide appropriate care and services related to nails.

Onyxology, as referred to in your answer, is a misconception. While it closely resembles the correct term, onychology is the established terminology used within the fields of beauty and health to describe the study of nails.

Trichology, on the other hand, pertains to the study of hair and hair-related issues. Dermatology covers a broader range of skin conditions and diseases but does not specifically focus on nails. Thus, onychology remains the most accurate and relevant term for your question.