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rhesus baby

noun
  1. 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 motherTechnical name: erythroblastosis fetalis
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Word Origin

C20: see Rh factor
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012