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[too-sahy-kuh l] /ˈtuˌsaɪ kəl/
noting or pertaining to an internal-combustion engine in which two strokes are required to complete a cycle (two-stroke cycle) one to admit and compress air or an air-fuel mixture and one to ignite fuel, do work, and scavenge the cylinder.
Compare four-cycle.
Origin of two-cycle
1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for two-cycle
Historical Examples
  • In the two-cycle engine, there is one power stroke to each up-and-down journey of the piston.

    Electricity for the farm Frederick Irving Anderson
  • In 1880 he began to commercialize a two-cycle stationary engine.

    Automobile Biographies Lyman Horace Weeks
  • Thus eight pounds per square inch is about the usual limit of crank case compression with this type of two-cycle motor.

    The Gasoline Motor Harold Whiting Slauson
  • Thus it is plain that the motor is of the four-cycle type and it should not be confounded with two-cycle motors.

  • This is called a two-cycle motor, because two complete revolutions are necessary to accomplish all the operations.

    Stories of Inventors Russell Doubleday
  • Atkinson was ingenious and persevering in the invention of two-cycle engines.

  • It will thus be seen that the piston of the two-cycle motor acts as a pump in two ways.

    The Gasoline Motor Harold Whiting Slauson
  • It certainly cannot become a perfect mixture in the time of a stroke of a high-speed motor of the two-cycle class.

    Aviation Engines Victor Wilfred Pag
  • This two-cycle engine later became very popular, especially for motor launch work.

  • The design shown at D in side and plan views is the conventional form employed in two-cycle engines.

    Aviation Engines Victor Wilfred Pag
British Dictionary definitions for two-cycle


(US & Canadian) relating to or designating an internal-combustion engine whose piston makes two strokes for every explosion Also called (in Britain and certain other countries) two-stroke See four-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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