Main Entry: col·o·ny–stim·u·lat·ing factor

Pronunciation: \-ˌstim-yə-ˌlāt-iŋ-\

Function: noun

: any of several glycoproteins that promote the differentiation of stem cells especially into blood granulocytes and macrophages and that stimulate their proliferation into colonies in culture—see granulocyte colony-stimulating factor, granulocyte-macrophage colony-stimulating factor, interleukin-3, macrophage colony-stimulating factor