blood basophil count CMO:0000034 EFO:0005090 The number of granulocytes categorized as basophils in a specified sample of blood. A basophil is a granular leukocyte with an irregularly shaped, relatively pale-staining nucleus that is partially constricted into two lobes, and with cytoplasm containing coarse granules of variable size that stain bluish-black when exposed to basic dyes. VT:0002607 basophil count basophil granulocyte count clinical_measurement_ontology blood granulocyte count