Source : Webster's Revised Unabridged Dictionary (1913)

Four-cycle \Four"-cy`cle\, n. (Thermodynamics)
   A four-stroke cycle, as the Otto cycle, for an
   internal-combustion engine. -- {Four"-cy`cle}, a.

Four-cycle \Four"-cy`cle\, n. (Thermodynamics)
   A four-stroke cycle, as the Otto cycle, for an
   internal-combustion engine. -- {Four"-cy`cle}, a.