Which of the following terms is represented by the prefix pil/o?

The prefix pil/o specifically refers to hair. In medical terminology, pil/o is used in various contexts related to hair, such as in conditions like pilonidal cyst, which involves a cyst that can develop near the sacrum and may contain hair follicles. The usage of this prefix highlights its direct association with hair structures in the body. Understanding this terminology helps in accurately coding and describing various dermatological and surgical conditions involving hair.