(bal'ăn-tīn di-zēz') Disorder of newborns marked by prolonged gestation (i.e., longer than 39 weeks), decreased alertness, low birth weight, and increased respiratory distress. Skin, nails, and cord often have a greenish tint. Cause is likely placental insufficiency. Synonym(s): Clifford disease, dysmaturity syndrome, Runge disease.