/ Dictionary / Index A arborio: Meaning and Definition of Find definitions for: ar•bo•ri•o Pronunciation: (är-bôr'ē-ō", -bōr'-), [key] a variey of cultivated short-grain rice with a high starch content: used esp. for risotto. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arboriculture arborist Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language