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[fawr-strohk, fohr-] /ˈfɔrˌstroʊk, ˈfoʊr-/
adjective, Machinery
Origin of four-stroke
1895-1900 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for four-stroke
  • But two-stroke engines tend to spew out more unburned fuel in the exhaust, which is why the four-stroke design became more common.
  • The cycle is then repeated for each four-stroke cycle.
  • Gas-powered models come in either two-stroke or four-stroke designs.
  • The new hyphen-filled motor is an air-cooled, fuel-injected three-valve four-stroke.
  • Knocking occurs when some unburned fuel-air mixture explodes in the wrong place and time in an engine's four-stroke cycle.
  • four-stroke engines are also available that comply with the new regulations.
  • While there are some two cylinder designs, this category primarily consists of two-stroke and four-stroke single cylinder engines.
  • We also expect manufacturers to increase the number of snowmobiles that use four-stroke engines top of page.
  • In the case of four-stroke engines, the water-ethanol phase may combust in the engine.
  • The two types of low pollution marine engines are the four-stroke engines and two-stroke direct fuel injection engines.
British Dictionary definitions for four-stroke


relating to or designating an internal-combustion engine in which the piston makes four strokes for every explosion US and Canadian name four-cycle Compare two-stroke
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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