An imaginary circle or orbit in the heavens; one of the celestial spheres.(noun)
source: webster1913
A series of operations in which heat is imparted to (or taken away from) a working substance which by its expansion gives up a part of its internal energy in the form of mechanical work (or being compressed increases its internal energy) and is again brought back to its original state.(noun)
source: webster1913
verb (v)
cause to go through a recurring sequence(verb.motion)
Example: Cycle the laundry in this washing program.