/ Dictionary / Index A arteriole: Meaning and Definition of Find definitions for: ar•te•ri•ole Pronunciation: (är-tēr'ē-ōl"), [key] — n. any of the smallest branches of an artery, terminating in capillaries. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arteriole (Thesaurus) arteriography arteriosclerosis Related Content Daily Word Quiz: pauper Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language