ˈgid.ə(r)- noun
Etymology: German gitter lattice, grating, probably alteration of Middle High German geter, from Old High German getiri; akin to Old High German gataro door and probably to Old English gaderian to gather — more at gather
: an enlarged phagocytic cell of microglial origin having the cytoplasm distended with lipid granules and being characteristic of certain organic brain lesions