Medical Definition of Neutrophil. Neutrophil: A type of white blood cell, a granulocyte that is filled with microscopic granules, little sacs containing enzymes that digest microorganisms. Also known as polymorphonuclear leukocyte or poly.
Definition of Neutropenia. Neutropenia: Not enough neutrophils, neutrophils being a type of white blood cell (specifically a form of granulocyte) filled with neutrally-staining granules, tiny sacs of enzymes that help the cell to kill and digest microorganisms it has engulfed by phagocytosis.
Neutropenia is a condition in which there are an abnormally low levels of neutrophils (white blood cells) in the blood. Neutropenia can be caused by numerous medical conditions or medications like chemotherapy. Symptoms of neutropenia are skin infections of the skin and other areas of the body, swollen gums, and sore mouth.