Definition of back pressure
1
: residual pressure on the exhaust side of a steam-engine piston against which the steam on the intake side must work
2
: opposition to flow of a liquid or gas due to friction, inertia, gravity, or other cause
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“Back pressure.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/back%20pressure. Accessed 5 May. 2021.
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Time Traveler for back pressure
The first known use of back pressure was in 1848
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