Ep·stein-Barr virus 
(ĕpstīn-bär)
(ĕpstīn-bär)n. Abbr. EBV
A herpesvirus that is the causative agent of infectious mononucleosis. It is also associated with various types of human cancers.
[After Michael A. Epstein and Y.M. Barr, 20th-century British virologists.]