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

 

gigantism

 noun
noun
BrE BrE//dʒaɪˈɡæntɪzəm//
 
; NAmE NAmE//dʒaɪˈɡæntɪzəm//
 
; BrE BrE//ˈdʒaɪɡæntɪzəm//
 
; NAmE NAmE//ˈdʒaɪɡæntɪzəm//
 
(also giantism)[uncountable](medical)
 
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a condition in which somebody grows to an unusually large size
See the Oxford Advanced American Dictionary entry: gigantism