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Meaning of four-cycle

four-cy•cle

Pronunciation: (fôr'sī"kul, fōr'-), [key]
— adj.
  1. noting or pertaining to an internal-combustion engine in which a complete cycle in each cylinder requires four strokes, one to draw in air or an air-fuel mixture, one to compress it, one to ignite it and do work, and one to scavenge the cylinder.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.