granulocyte neutrophil James Malone MSH:D009504 Ele Holloway SNOMEDCT:116712007 Any of the immature or mature forms of a granular leukocyte that in its mature form has a nucleus with three to five lobes connected by slender threads of chromatin, and cytoplasm containing fine inconspicuous granules and stainable by neutral dyes. NCIt:C12533 A fully differentiated basophil, a granular leukocyte with an irregularly shaped, pale-staining nucleus that is partially constricted into two lobes, and with cytoplasm that contains coarse granules of variable size. Basophils contain vasoactive amines such as histamine and serotonin, which are released on appropriate stimulation. true Tomasz Adamusiak A fully differentiated basophil, a granular leukocyte with an irregularly shaped, pale-staining nucleus that is partially constricted into two lobes, and with cytoplasm that contains coarse, bluish-black granules of variable size. Basophils contain vasoactive amines such as histamine and serotonin, which are released on appropriate stimulation.