Which root refers to hair?

The root that refers to hair is "trich/o." This combining form comes from the Greek word "trichos," which means hair. It is commonly used in medical terminology to describe conditions or treatments related to hair. For example, "trichotomy" refers to the act of cutting hair, and "trichotillomania" refers to a compulsive disorder characterized by the urge to pull out one's hair.

The other roots listed do not pertain to hair. "Ungu/o" relates to nails, "xer/o" means dry, and "hypo-" indicates a deficiency or below normal level. Understanding these roots and their meanings is essential for accurately interpreting medical terms and aiding in effective communication within the healthcare field.