exhaust stroke

noun

Definition of exhaust stroke

: the movement of an engine piston (as of a 4-stroke-cycle engine) that forces the used gas or vapor out through the exhaust ports

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“Exhaust stroke.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/exhaust%20stroke. Accessed 5 Mar. 2021.

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