: of, relating to, or being an Rh factor
Rh antigens
Rh sensitization in pregnancy

Rh

2 of 3

symbol

rhodium

RH

3 of 3

abbreviation

Word History

First Known Use

Adjective

1940, in the meaning defined above

Time Traveler
The first known use of Rh was in 1940

Dictionary Entries Near Rh

Cite this Entry

“Rh.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Rh. Accessed 26 Sep. 2023.

Medical Definition

Rh

1 of 3 adjective
: of, relating to, or being an Rh factor
Rh antigens
Rh sensitization in pregnancy

Rh

2 of 3 symbol
rhodium

RH

3 of 3 abbreviation
relative humidity

More from Merriam-Webster on Rh

Love words? Need even more definitions?

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