erythroblastosis fetalis
noun
erythroblastosis fe·ta·lis -fi-ˈta-ləs 
: a hemolytic disease of the fetus and newborn that occurs when the immune system of an Rh-negative mother produces antibodies to an antigen in the blood of an Rh-positive fetus which cross the placenta and destroy fetal erythrocytes and that is characterized by an increase in circulating erythroblasts and by jaundice
Word History
Etymology
New Latin, fetal erythroblastosis
First Known Use
circa 1934, in the meaning defined above
Medical Definition
erythroblastosis fetalis
noun
erythroblastosis fe·ta·lis -fi-ˈtal-əs
: a hemolytic disease of the fetus and newborn that is characterized by an increase in circulating erythroblasts and by jaundice and that occurs when the immune system of an Rh-negative mother produces antibodies to an antigen in the blood of an Rh-positive fetus which cross the placenta and destroy fetal red blood cells
called also hemolytic disease of the newborn, Rh disease