Etymology
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effluent (adj.)

mid-15c., from Latin effluentem (nominative effluens) "flowing out," present participle of effluere "to flow out," from assimilated form of ex "out" (see ex-) + fluere "to flow" (see fluent). As a noun, "that which flows out," from 1859; specific meaning "liquid industrial waste" is from 1930.

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Definitions of effluent
1
effluent (n.)
water mixed with waste matter;
Synonyms: wastewater / sewer water
2
effluent (adj.)
that is flowing outward;
Synonyms: outflowing
From wordnet.princeton.edu