Rh negative

or Rh-neg·a·tive

[ ahr-eych neg-uh-tiv ]

adjective

1. Rh factor

Rh negative

noun

1. blood that does not contain the Rh factor
2. a person having such blood

Word History and Origins

Origin of Rh negative¹

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

Its components, including antibodies, are the raw material for the production of life-saving medications used every day in emergency rooms and hospitals to treat immune diseases, stop bleeding, and save babies born to Rh-negative mothers.

From The Guardian

Variations in their immune cells and proteins include a higher-than-normal frequency of Rh-negative blood types, for example.

From Science Magazine

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

Type O, RH-negative blood can be used by anyone, regardless of their blood type.

From US News