/ Dictionary / Index M Madagascar periwinkle: Meaning and Definition of Find definitions for: Mad'agas'car per'iwinkle Pronunciation: [key] a plant, Catharanthus roseus (or Vinca rosea), cultivated for its glossy foliage and pink or white flowers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Madagascar jasmine Madalyn Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language