Meaning of reticuloendothelial system

reticuloendothe'lial sys"tem

Pronunciation: [key]
— Immunol. Immunol.
  1. the aggregate of the phagocytic cells, including certain cells of the bone marrow, lymphatic system, liver, and spleen, that have reticular and endothelial characteristics and function in the immune system's defense against foreign bodies. Abbr.: RES
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.