coryza Syllabification: (co·ry·za)Pronunciation: /kəˈrīzə/Definition of coryza noun Medicine catarrhal inflammation of the mucous membrane in the nose, caused especially by a cold or by hay fever. Origin: early 16th century: from Latin, from Greek koruza 'nasal mucus'coryza in other Oxford dictionaries Definition of coryza in the British & World English dictionary