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

Type of: blood group, blood type

• outrigged
• outrigger
• outrigger canoe
• outright
• outrival
• outroar
• outrun
• outré
• outsail
• outscore
• outsell
• outset
• outshine
• outshout
• outside
• outside caliper
• outside clinch
• outside door
• outside loop
• outside marriage
• outside mirror
• outsider
• outsider art
• outsize
• outsized