/ Dictionary / Index M Marcellinus: Meaning and Definition of Find definitions for: Mar•cel•li•nus Pronunciation: (mär"su-lī'nus), [key] dieda.d.304, pope 296–304. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. marcella Marcello Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language