noun, plural: androgenic hairs
Androgenic hair is a terminal hair that grows on human body parts that are sensitive to increased androgen levels. Androgen is a steroid hormone produced in the adrenal glands, the testes, and the ovaries. Androgen levels significantly increase at puberty. Certain body parts are more sensitive to androgen and thereby grow terminal hairs. Terminal hair is a type of hair that is dark and thick. It replaces the soft, non-pigmented, thin vellus hair that covers most of the human body. The body areas where androgenic hair grows are the pubic area and the armpits. The hair is specifically called pubic hair and axillary hair, respectively. In males, there are more body parts that are sensitive to androgen and grow androgenic hair such as facial hair, chest hair, abdominal hair, and other corporeal hair. Androgenic hair does not include the hair growing on the scalp (i.e. scalp hair). The androgenic hair has the same hair cycle as the scalp hair. However, the anagen phase (growing period) is shorter and the telogen phase (dormant period) is longer in androgenic hair cycle.