reticuloendothelial
Concise Oxford English Dictionary © 2008 Oxford University Press:
reticuloendothelial /rɪˌtɪkjʊləʊɛndə(ʊ)ˈθiːlɪəl/
▶adjective Physiology relating to or denoting a system of fixed and circulating phagocytic cells involved in the immune response.
'reticuloendothelial' also found in these Oxford entries:

