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rheumatoid factor

American  
[roo-muh-toid fak-ter] / ˈru məˌtɔɪd ˈfæk tər /

noun

Biochemistry.

  1. an antibody that is found in the blood of many persons with rheumatoid arthritis and that reacts against globulins in the blood.

Etymology

Origin of rheumatoid factor

First recorded in 1945–50

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.

My mother’s conditions are not hereditary, nor are they related to migraine, but neurologists still want to test my blood for rheumatoid factor and other traces of autoimmune disease.

From The Guardian • Nov. 17, 2016

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.