A<unk>  is a patch of<unk>  growing in a circular direction around a visible center point.<unk> s occur in most<unk> y animals, on the body as well as on the head.<unk> s, also known as crowns, swirls, or trichoglyphs, can be either clockwise or counterclockwise in direction of growth.
Hair whorl
Tycoon's cap
Cradle cap
Crown 
Half and half nail
Skin bridge
Ingrown hair
Cutaneous horn