Breadcrumb Home > Dictionary > Index O orange rust: Meaning and Definition of Find definitions for: or'ange rust' Pronunciation: [key] — Plant Pathol. Plant Pathol. a disease of blackberries and raspberries, characterized by an orange, powdery mass of spores on the undersides of the leaves and stunted, misshapen foliage, caused by a rust fungus, Gymnoconia interstitialis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. orange pekoe orangery 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: passim Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language