‖ conˈfluviumObs.rare. Pl. -a. [L. confluvium flowing together, f.confluĕre: cf.effluvium.] A flowing together, conflux. 1670Phil.Trans. V. 1084 Comets, which he supposeth to be made up of the æthereal Effluvia of the Luminaries, or the Confluvia of the æthereal matter.