Breadcrumb Home > Dictionary > Index B black chaff: Meaning and Definition of Find definitions for: black' chaff' Pronunciation: [key] — Plant Pathol. Plant Pathol. a disease of wheat, characterized by dark, elongated stripes on the chaff, caused by a bacterium, Xanthomonas translucens undulosum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. black carpet beetle black cherry TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: acme Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language