/ Dictionary / Index C coordination number: Meaning and Definition of Find definitions for: coordina'tion num"ber Pronunciation: [key] — Crystall. Crystall. the number of anions surrounding a single cation in a stable crystal structure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. coordination compound coordinator Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language