Final answer:
The term spelled correctly is macrophage, which is a type of phagocyte that plays a crucial role in the immune system.
Step-by-step explanation:
The correct spelling is macrophage. A macrophage is a type of phagocyte that plays a crucial role in the immune system. It is derived from a monocyte and can engulf and digest foreign cells and pathogens. Macrophages are responsible for clearing intracellular bacteria and are an essential component of the body's defense against potential pathogens.