/ Dictionary / Index P Pilcomayo: Meaning and Definition of Find definitions for: Pil•co•ma•yo Pronunciation: (pēl"kô-mä'yô), [key] — n. a river in S central South America, flowing SE from S Bolivia along the boundary between Paraguay and Argentina to the Paraguay River at Asunción. 1000 mi. (1610 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pilchard pilcrow Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language