/ Dictionary / Index P prochoos: Meaning and Definition of Find definitions for: pro•cho•os Pronunciation: (prō'kō-os", prok'ō-), [key] — pl. pro•cho•oi an elongated form of the oinochoe. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pro-choice prochronism Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language