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rheology
rheometer
rheomorphism
rheostat
rheotaxis
rheotropism
Rhesus
rhesus baby
Rhesus factor
rhesus monkey
Rhesus negative
Rhesus positive
rhetoric
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rhetorical question
rhetorician
rheum
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rheumatoid factor
rheu·ma·toid fac·tor


noun 
Definition:
 
substance in blood of rheumatic patients: an antibody found in the blood serum of many people who have rheumatoid arthritis
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