/ Dictionary / Index K Krebs urea cycle: Meaning and Definition of Find definitions for: Krebs' ure'a cy"cle. Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Krebs cycle Krefeld Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language