A macaque monkey native to southern and southeastern Asia; Macaca mulatta. / (medicine) Alternative form of Rhesus.

(medicine, attributive, also without cap.) Denotes a system for categorising human blood types based on the presence or absence of various antigens, especially Rhesus factor D.

plural of rhesus macaque

plural of rhesus monkey

(of blood or of a person) Having the RhD antigen present in red blood cells.

(of blood or of a person) Lacking the RhD antigen in red blood cells.

(medicine) A blood group system, the second most important after the ABO system, and important in human blood transfusion, whereby blood types are classified according to the presence ("positive") or absence ("negative") of potentially over 50 antigens, of which the most commonly referenced is RhD.

The rhesus macaque, Macaca mulatta

A monkey, Macaca mulatta, common throughout southern Asia, that is extensively used for medical research.

plural of Rhesus factor