/ Dictionary / Index P pneumectomy: Meaning and Definition of Find definitions for: pneu•mec•to•my Pronunciation: (noo-mek'tu-mē, nyoo-), [key] — pl. -mies. pneumonectomy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pneumatotherapy pneumo- Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language