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

Origin of CD4

1980–85; c(luster of) d(ifferentiation) 4 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Contemporary Examples of cd4

cd4 in Medicine




A glycoprotein on the surface of helper T cells that serves as a receptor for HIV.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.