Here's why:
* Terminal hair is the type of hair that grows on your head, face, and pubic area. It's generally thicker, coarser, and darker than other types of hair.
* Vellus hair is the fine, soft hair that covers most of your body. It's often lighter in color than terminal hair.
While eyebrow hair is thinner than head hair, it's still considered terminal hair due to its coarseness, pigmentation, and the fact that it continues to grow throughout your life.