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

 

chrysanthemum

 noun
noun
BrE BrE//krɪˈsænθəməm//
 
; NAmE NAmE//krɪˈsænθəməm//
 
; BrE BrE//krɪˈzænθəməm//
 
; NAmE NAmE//krɪˈzænθəməm//
 
 
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a large, brightly coloured garden flower that is shaped like a ball and is made up of many long narrow petals Word Origin mid 16th cent. (originally denoting the corn marigold): from Latin, from Greek khrusanthemon, from khrusos ‘gold’ + anthemon ‘flower’.
See the Oxford Advanced American Dictionary entry: chrysanthemum