柯林斯詞典dieback /?da??b?k/ 1. N a disease of trees and shrubs characterized by death of the young shoots, which spreads to the larger branches: caused by injury to the roots or attack by bacteria or fungi (植物根部受傷或受細(xì)菌、真菌等侵害造成的)頂梢枯死2. V (of plants) to suffer from dieback (植物)頂梢枯死 返回 die back