CTRP Terminology Leukocyte Granulocyte Basophil Basophil Basophilic Leukocyte Basophils Basophil basophil C0004827 Basophilic Granulocyte Basophil A type of immune cell that has granules (small particles) with enzymes that are released during allergic reactions and asthma. A basophil is a type of white blood cell and a type of granulocyte. Cell Basophil C12531 CTRP CTRP Biomarker Terminology