/ Dictionary / Index O organ pipe: Meaning and Definition of Find definitions for: or'gan pipe" Pronunciation: [key] one of the pipes of a pipe organ. something resembling such a pipe. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. organotropism organ-pipe cactus Related Content Daily Word Quiz: abstain Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language