Microglia Definition

mīkrō-glēə, -glī-
noun
Any of the small neuroglial cells of the central nervous system having long processes and amoeboid and phagocytic activity at sites of neural damage or inflammation.
American Heritage
Small neuroglial cells of the central nervous system that have long processes and act as phagocytes at sites of neural damage or inflammation, destroying pathogens and damaged cells.
American Heritage Medicine