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

A reaction there indicates you are Rh-positive; if nothing happens, you’re Rh-negative.

From Los Angeles Times

Through a quirk of biology, Harrison’s blood contains a special antibody that can protect women and their unborn fetuses from “rhesus disease” — an unfortunate condition when the immune system of a woman with Rh-negative blood type attacks her Rh-positive fetus.

From Forbes

Injected into the Rh-negative mother, the antibodies bind to and destroy fetal Rh-positive blood cells that have passed from the fetus to the mother during birth.

From New York Times

Fluid withdrawn through the needle showed the extent to which the baby's Rh-positive cells were being destroyed by antibody from the Rh-negative mother.

From Time Magazine Archive

And through this he injected red cells, Rh-negative like the mother's, to replace the baby's own Rh-positive cells, which were being destroyed.

From Time Magazine Archive