ˈled.ərə(r)ˈzēvə- noun
Usage: usually capitalized L&S
Etymology: after Erich Letterer b 1895 German pathologist and Sture A. Siwe b 1897 pediatrican and professor in Sweden, who first described it
: an acute disease of children characterized by fever, hemorrhages, and other evidences of a disturbance in the reticuloendothelial system and by severe bone lesions especially of the skull