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English definition of “rhesus factor”

rhesus factor

noun [S] uk   /ˈriː.səsˌfæk.tər/ us    /ˈriː.səsˌfæk.tɚ/ (written abbreviation Rh factor) specialized
a substance in the red blood cells of most people that causes the production of antibodies in the blood: People whose blood contains the rhesus factor are rhesus positive (Rh+) and those whose blood does not contain it are rhesus negative (Rh-).
(Definition of rhesus factor from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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