CD4

noun

1. a protein on the surface of T cells and other cells, functioning as a receptor for the AIDS virus antigen.

Word History and Origins

Origin of CD4¹

1980–85; c(luster of) d(ifferentiation) 4

Example Sentences

The first difference was this: their CD4 cells, also called T-cells or T4 cells, were normal.

From The Daily Beast

Since AIDS first was described, the CD4 cell count has been the clinical signpost that guided doctors and patients.

From The Daily Beast