Also called leukocytes, these nearly colorless blood cells defend the body against infection
These include your skin, 
tears, mucus, cilia, stomach acid,'friendly' bacteria and white blood cells called ... 
Any of various nearly colorless cells of the immune system that... [DOC] [TLE] The White Cell [PAR] White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of 
the immune ... Riley IU Health White blood cells (leukocytes) defend the body 
against infection.