leucocyte /ˈluːkə(ʊ)sʌɪt/ noun1 •Any of a class of blood cells that play various roles in cell-mediated immunity.In disease of the spleen, especially Banti's disease or fibro-adenia of the spleen, the increase of leukocytes is absent or slight, with no relative lymphocytosis. — 1923 formsleucocytes
