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oak wilt
oak wiltn. A disease of oak trees caused by the fungus Ceratocystis fagacearum that results in discoloration, wilting, and dropping of leaves, and often death of the tree.oak′ wilt`
n. a disease of oaks, characterized by wilting, discoloration, and loss of leaves, caused by a fungus, Ceratocystis fagacearum. [1940–45, Amer.] oak wilt
oak wilt[′ōk ‚wilt] (plant pathology) A fungus disease of oak trees caused by Chalara quercina, characterized by wilting and yellow and red discoloration of the leaves progressing from the top downward and inward. |