from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Rh factor.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An antigen (also referred to as RhD) appearing on the surface of the red blood cells of most (85%) humans. An incompatibility between the Rh-blood types of a mother and her baby may cause serious disease for the baby.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a blood group antigen possessed by Rh-positive people; if an Rh-negative person receives a blood transfusion from an Rh-positive person it can result in hemolysis and anemia
From its having first been detected in the blood of the rhesus monkey.(American Heritage® Dictionary of the English Language, Fourth Edition)
The antigen was discovered in connection with a research of rhesus monkeys. (Wiktionary)