/ Dictionary / Index V virusoid: Meaning and Definition of Find definitions for: vi•rus•oid Pronunciation: (vī'ru-soid"), [key] a small particle of RNA associated with the larger RNA of some infectious plant viruses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: virusoid (Thesaurus) virus vis* Related Content Daily Word Quiz: innocuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language