/ Dictionary / Index A Arecibo: Meaning and Definition of Find definitions for: A•re•ci•bo Pronunciation: (är"u-sē'bō Sp. ä're-sē'bô), [key] — n. a seaport in N Puerto Rico. 83,300. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. areca nut Arecibo Observatory 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