1. jaundice, neonatal Yellowdiscoloration of the SKIN; MUCOUS MEMBRANE; and SCLERA in the NEWBORN. It is a sign of NEONATAL HYPERBILIRUBINEMIA. Most cases are transient self-limiting (PHYSIOLOGICAL NEONATAL JAUNDICE) occurring in the firstweek of life, but some can be a sign of pathological disorders, particularly LIVER DISEASES.