First Known Use: 13th century
Dictionary
diadem
noun di·a·dem \ˈdī-ə-ˌdem, -dəm\
: a crown that is worn especially by a king or queen as a symbol of royalty
Full Definition of DIADEM
2
: something that adorns like a crown
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Origin of DIADEM
Middle English diademe, from Anglo-French, from Latin diadema, from Greek diadēma, from diadein to bind around, from dia- + dein to bind; akin to Sanskrit dāman rope
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