/ Dictionary / Index V vitamin B complex: Meaning and Definition of Find definitions for: vitamin B complex Pronunciation: [key] an important group of water-soluble vitamins containing vitamin B, vitamin B, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. vitamin B vitamin C Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language