Source : Webster's Revised Unabridged Dictionary (1913)

Effluent \Ef"flu*ent\, n. (Geog.)
   A stream that flows out of another stream or lake.

Effluent \Ef"flu*ent\, a. [L. effluens, -entis, p. pr. of
   effluere to flow out; ex + fluere to flow: cf. F. effluent.
   See {Fluent}.]
   Flowing out; as, effluent beams. --Parnell.

Source : WordNet®

effluent
     adj : that is flowing outward [syn: {outflowing}]
     n : water mixed with waste matter [syn: {wastewater}, {sewer
         water}]