upstream
adverb or adjectiveDefinition of upstream
1
: in the direction opposite to the flow of a stream
2
: in or to a position within the production stream closer to manufacturing processes
make most of its money upstream, selling cheap crude … to refineries— John Quirt
3
biochemistry
: toward the beginning of a series of cellular processes : preceding a linked molecular event occurring in a sequence
Many signaling pathways possess intrinsic negative feedback by which a downstream event in a pathway turns off an upstream event.— Harvey Lodish et al.
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