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

 

corm

 noun
noun
BrE BrE//kɔːm//
 
; NAmE NAmE//kɔːrm//
 
 
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the small round underground part of some plants, from which the new plant grows every year Word Origin mid 19th cent.: from modern Latin cormus, from Greek kormos ‘trunk stripped of its boughs’.
See the Oxford Advanced American Dictionary entry: corm