| an infant born with cyanosis resulting from a congenital heart or lung defect. |

| blue baby n. An infant born with cyanosis as a result of a congenital cardiac or pulmonary defect that causes inadequate oxygenation of the blood. |
blue baby n.
An infant born with cyanosis as a result of a congenital cardiac or pulmonary defect that causes incomplete oxygenation of the blood.