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 • Oct. 26, 2023

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

From Los Angeles Times • Jul. 9, 2020

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 • Dec. 18, 2014

What happens is that the baby's red blood cells which contain the Rh factor become mixed in some unknown way with the Rh negative blood of the mother.

From Time Magazine Archive

For if a wife's blood were Rh negative and a husband's Rh positive, their child might be stillborn, or born with erythroblastosis fetalis, characterized by anemia and jaundice.

From Time Magazine Archive

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