/ Dictionary / Index S stemma: Meaning and Definition of Find definitions for: stem•ma Pronunciation: (stem'u), [key] — pl. stem•ma•ta ocellus (def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: stemma (Thesaurus) St.-Émilion stemmed Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language