See carbon cycle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Examples from the Web for bethe cycle
Historical Examples of bethe cycle
Even von Schlichten, who had seen H-bombs and Bethe-cycle bombs, was impressed.Uller Uprising
Henry Beam Piper, John D. Clark and John F. Carr