Definition of rhizome noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈraɪzəʊm//
; NAmE NAmE//ˈraɪzoʊm//
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the thick stem of some plants, such as iris and mint, that grows along or under the ground and has roots and stems growing from it Word Originmid 19th cent.: from Greek rhizōma, from rhizousthai ‘take root’, based on rhiza ‘root’.
See the Oxford Advanced American Dictionary entry: rhizome