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English definition of “tuber”

tuber

noun [C]     /ˈtjuː.bər/ US  /ˈtuː.bɚ/
a swollen underground stem or root of a plant from which new plants can grow , as in the potato Parts of plants tuberous     /ˈtjuː.bə.rəs/ US  /ˈtuː.bɚ.əs/ adjective Types of plant
(Definition of tuber noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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