Definition of tuber noun from the Oxford Advanced American Dictionary

 

tuber

 noun
noun
NAmE//ˈtubər//
 
 
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the short, thick, round part of an underground stem or root of some plants, such as potatoes, which stores food and from which new plants grow
NAmE//ˈtubərəs//
 
adjective tuberous begonias
See the Oxford Advanced Learner's Dictionary entry: tuber