/ Dictionary / Index V vivax malaria: Meaning and Definition of Find definitions for: vi'vax malar"ia Pronunciation: (vī'vaks), [key] — Pathol. Pathol. the most common form of malaria, caused by the protozoan Plasmodium vivax and marked by the occurrence of attacks every other day. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. viva voce Vivekananda Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language