1. The blood group whose red cells lack the Rh factor (Rh antigen)
   - Rh-negative blood type, Rh negative

Type of: blood group, blood type

• alms tray
• almsgiver
• almsgiving
• almshouse
• Alnico
• Alnus
• Alnus crispa
• Alnus glutinosa
• Alnus incana
• Alnus maritima
• Alnus rhombifolia
• Alnus rubra
• Alnus rugosa
• Alnus serrulata
• Alnus veridis
• Alnus veridis crispa
• Alnus vulgaris
• alocasia
• Alocasia macrorrhiza
• aloe
• aloe family
• Aloe ferox
• Aloe vera
• Aloeaceae
• aloes