Leukocyte
From Memory Alpha, the free Star Trek reference
A leukocyte is a cell in the immune system that defend the body against infections and other foreign bodies.
During the final stages of the Teplan blight, production of leukocytes increases. (DS9: "Inter Arma Enim Silent Leges")
The leukocytes in Elim Garak's body were altered by his cranial implant, leaving toxins to build up in his body. In 2370, Julian Bashir and Jabara believed they could synthesize Cardassian leukocytes, although not in enough time to save Garak's life. (DS9: "The Wire")
