/ ˈtjuːbə(r); NAmE ˈtuː-/ noun
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
► tu·ber·ous / ˈtjuːbərəs; NAmE ˈtuː-/ adjective
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WORD ORIGIN
mid 17th cent.: from Latin , literally hump, swelling .