granulocyte-macrophagecolony-stimulating factor

gran·u·lo·cyte-mac·ro·phage colony-stimulating factor (grănʹyə-lō-sīt'măkʹrə-fāj') n. Abbr. GMCSF

A naturally occurring protein that stimulates the production of granulocytes and macrophages by stem cells and is used as a drug by some immunosuppressed individuals.

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