A type of immune cell that has granules (small particles) with enzymes that are released during infections, allergic reactions, and asthma. An eosinophil is a type of white blood cell and a type of granulocyte.
Definition (MSH)
Granular leukocytes with a nucleus that usually has two lobes connected by a slender thread of chromatin, and cytoplasm containing coarse, round granules that are uniform in size and stainable by eosin.
Definition (NCI)
Granular leukocytes with a nucleus that usually has two lobes connected by a slender thread of chromatin, and cytoplasm containing coarse, round granules that are uniform in size and stainable by eosin.
Definition (CSP)
granular leukocyte readily stained by eosin; granules are coarse, round, and uniform in size; the nucleus usually has two lobes connected by a slender thread of chromatin; these cells are thought to play a specialized role in immunity to helminth infections.