/ Dictionary / Index O orrisroot: Meaning and Definition of Find definitions for: or•ris•root Pronunciation: (ôr'is-rt", -root", or'-), [key] — n. the rootstock of the orris, used in perfumery, medicine, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: orrisroot (Thesaurus) orris orrow Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language