rhesus baby
(ˈriːsəs) n (Gynaecology & Obstetrics) a baby suffering from haemolytic disease at birth as its red blood cells (which are Rh positive) have been attacked in the womb by antibodies from its Rh negative mother. Technical name: erythroblastosis fetalis
[C20: see Rh factor]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014