/ Dictionary / Index A avirulent: Meaning and Definition of Find definitions for: a•vir•u•lent Pronunciation: (ā-vir'yu-lunt, ā-vir'u-), [key] — adj. (of organisms) having no virulence, as a result of age, heat, etc.; nonpathogenic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: avirulent (Thesaurus) aviophobia Avis Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language