/ Dictionary / Index A avitaminosis: Meaning and Definition of Find definitions for: a•vi•ta•min•o•sis Pronunciation: (ā-vī"tu-mu-nō'sis), [key] — n. Pathol. any disease caused by a lack of vitamins. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: avitaminosis (Thesaurus) aviso Aviv Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language