noun
granulocyte
Medical term for a type of white blood cell containing granules in its cytoplasm.
顆粒球は免疫系で重要な役割を果たす。
Granulocytes play an important role in the immune system.
Compound of 顆粒 (karyū, 'granule') and 球 (kyū, 'sphere, cell'), reflecting the granular appearance of these cells under a microscope.