Flowing out or forth.
Something that flows out or forth, especially:
a. A stream flowing out of a body of water.
b. An outflow from a sewer or sewage system.
c. A discharge of liquid waste, as from a factory or nuclear plant.
[Middle English, from Latin effluēns, effluent-, present participle of effluere, to flow out : ex-, ex- + fluere, to flow; see bhleu- in the Appendix of Indo-European roots.]
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