CD4-positive T lymphocyte

Definition / meaning of CD4-positive T lymphocyte

A type of immune cell that stimulates killer T cells, macrophages, and B cells to make immune responses. A CD4-positive T lymphocyte is a type of white blood cell and a type of lymphocyte. Also called helper T cell.

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Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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