/ Dictionary / Index P pneumatic duct: Meaning and Definition of Find definitions for: pneumat'ic duct' Pronunciation: [key] the duct joining the air bladder and alimentary canal of a physostomous fish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pneumatic pneumatic pile Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language