down stream

downstream

[doun-streem]
adverb
1.
with or in the direction of the current of a stream.
adjective
2.
of or pertaining to the latter part of a process or system.
3.
Genetics. with or in the direction of transcription, translation, or synthesis of a DNA, RNA, or protein molecule.

Origin:
1700–10; down1 + stream

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Collins
World English Dictionary
downstream (ˈdaʊnˈstriːm)
 
adv, —adj
1.  in or towards the lower part of a stream; with the current
2.  (in the oil industry) of or for the refining, distribution, or marketing of oil or its derived products

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

downstream
1706, from down (prep.) + stream.
Online Etymology Dictionary, © 2010 Douglas Harper
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