rheumatoid factor: Meaning and Definition of

rheu'matoid fac"tor

Pronunciation: [key]
— Biochem. Biochem.
  1. an antibody that is found in the blood of many persons afflicted with rheumatoid arthritis and that reacts against globulins in the blood.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.