粒細胞

granulocyte

grain / granule / classifier for small round things (peas, bullets, peanuts, pills, grains etc)

thin or slender / finely particulate / thin and soft / fine / delicate / trifling / (of a sound) quiet / frugal

cell (biology)

placenta / womb / born of the same parents

basophil granulocytes (rarest type of white blood cell)

neutrophil (the most common type of white blood cell)

eosinophil (type of white blood cell)