/ Dictionary / Index P plumbous: Meaning and Definition of Find definitions for: plum•bous Pronunciation: (plum'bus), [key] — adj. Chem. containing bivalent lead. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plumbous (Thesaurus) plumb line plumbous oxide Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language