/ Dictionary / Index P pneumato-: Meaning and Definition of Find definitions for: pneumato- Pronunciation: [key] a combining form meaning “air,” “breath,” “spirit,” used in the formation of compound words: pneumatology; pneumatophore. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pneumatic trough pneumatocyst 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