Rh-negative blood rhne·ga·ti·veblood uncommon noun 1. the blood group whose red cells lack the Rh factor (Rh antigen) SynonymsRh-negative blood typeRh-negative bloodRh negative Related words Word family Rh-negative blood type Broader terms blood group WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
