Breadcrumb Home > Dictionary > Index P Pierce's disease: Meaning and Definition of Find definitions for: Pierce''s disease" Pronunciation: [key] — Plant Pathol. Plant Pathol. a disease of grapes caused by a rickettsialike organism, characterized by dwarfing of vines, mottling of woody tissues, and plant death. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pierced piercing TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language