from The American Heritage® Dictionary of the English Language, 4th Edition
- n. 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A cytokine protein secreted by macrophages, T cells, mast cells, endothelial cells and fibroblasts.
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