Jaundice (JAWN-dis): A condition in which the skin and the whites of the eyes become yellow, urine darkens, and stool becomes clay colored. Jaundice occurs when the liver is not working properly or when a bile duct is blocked.

Junctional nevus (JUNK-shun-ul NEE-vus): A mole found in the junction (border) between the epidermis and dermis layers of the skin. These moles may be pigmented and slightly raised, and have a higher risk of developing into malignant melanoma.