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a protein on the surface of T cells and other cells, functioning as a receptor for the AIDS virus antigen.
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Origin of CD4
1980–85; c(luster of) d(ifferentiation) 4
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use CD4 in a sentence
The first difference was this: their CD4 cells, also called T-cells or T4 cells, were normal.
Since AIDS first was described, the CD4 cell count has been the clinical signpost that guided doctors and patients.