a large white blood cell that plays a role in immune
defense by acting as a scavenger that destroys invading microorganisms.
Monocytes circulate in the bloodstream; when they migrate to the tissues,
they mature into macrophages. Monocytes are a reservoir of HIV.
MonocyteJAMA A large white blood cell that ingests microbes or other cells and foreign particles. When a monocyte enters tissues, it develops into a macrophage. See also Macrophage.
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