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Definition of Dieback
1. Noun. A disease of plants characterized by the gradual dying of the young shoots starting at the tips and progressing to the larger branches. 
Definition of Dieback
1. a gradual dying of plant shoots [n -S]
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1. Noun. A disease of plants characterized by the gradual dying of the young shoots starting at the tips and progressing to the larger branches. 
1. a gradual dying of plant shoots [n -S]