leukocyte

noun

1. 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.”

   “Iberdomide, a cereblon modulator promoting degradation of the transcription factors Ikaros and Aiolos, which affect leukocyte development and autoimmunity, is being evaluated for the treatment of systemic lupus erythematosus (SLE).”