Rh positive

or Rh-pos·i·tive

[ ahr-eych poz-i-tiv ]

adjective

1. Rh factor

Rh positive

noun

1. blood containing the Rh factor
2. a person having such blood

Word History and Origins

Origin of Rh positive¹

First recorded in 1955–60

Example Sentences

The doctor must test the woman’s blood to see if she is Rh positive, a marker that could complicate future pregnancies, even though medical guidelines say the test is not necessary before at least eight weeks.

From New York Times

If you have it, you’re Rh positive; if not, you’re Rh negative.

From Los Angeles Times

Looking at just the Rh factor, the team found that diabetes risk was the same whether or a not a woman was Rh positive or Rh negative.

From US News

If the mother has Rh negative blood but the baby is Rh positive she can develop antibodies to her baby´s blood during labour.

From BBC

If clumping occurs, technicians can be sure that the specimen is Rh positive.

From Time Magazine Archive