Rh factor

noun
\ˌär-ˈāch- \

Definition of Rh factor 

: any of one or more genetically determined antigens present in the red blood cells of most persons and of higher animals and capable of inducing intense immunogenic reactions

First Known Use of Rh factor

1942, in the meaning defined above

History and Etymology for Rh factor

rhesus monkey (in which it was first detected)

Keep scrolling for more

Learn More about Rh factor

Dictionary Entries near Rh factor

rheumed

rheumily

rhexia

Rh factor

RHI

rhigolene

rhin-

Statistics for Rh factor

Look-up Popularity

Time Traveler for Rh factor

The first known use of Rh factor was in 1942

See more words from the same year

Keep scrolling for more

More Definitions for Rh factor

Rh factor

noun

English Language Learners Definition of Rh factor

medical : a substance that is present in the red blood cells of most people

Rh factor

noun
\ˈär-ˈāch- \

Medical Definition of Rh factor 

: a genetically determined protein on the red blood cells of some people that is one of the substances used to classify human blood as to compatibility for transfusion and that when present in a fetus but not in the mother causes a serious immunogenic reaction in which the mother produces antibodies that cross the placenta and attack the red blood cells of the fetus

called also rhesus factor

Comments on Rh factor

What made you want to look up Rh factor? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to reject or criticize sharply

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!