Synonyms

Rh negative

American

[ahr-eych neg-uh-tiv] / ˈɑrˈeɪtʃ ˈnɛg ə tɪv /

Or Rh-negative

adjective

Rh factor

Rh negative British

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Rh negative

First recorded in 1955–60

Compare meaning

How does rh-negative compare to similar and commonly confused words? Explore the most common comparisons:

Rh negative vs. Rh positive

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Local and regional blood banks are particularly low on platelets and types O and Rh negative blood, the department said Wednesday.

From Seattle 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

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023