Definition of fleur-de-lis noun from the Oxford Advanced Learner's Dictionary

 

fleur-de-lis

 noun
(also fleur-de-lys)noun
BrE BrE//ˌflɜː də ˈliː//
 
; NAmE NAmE//ˌflɜːr də ˈliː//
 
; BrE BrE//ˌflɜː də ˈliːs//
 
; NAmE NAmE//ˌflɜːr də ˈliːs//
 
(pl. fleurs-de-lis, fleurs-de-lys
BrE BrE//ˌflɜː də ˈliː//
 
; NAmE NAmE//ˌflɜːr də ˈliː//
 
; BrE BrE//ˌflɜː də ˈliːs//
 
; NAmE NAmE//ˌflɜːr də ˈliːs//
 
)
(from French)
 
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a design representing a flower with three petals joined together at the bottom, often used in coats of arms Word Origin Middle English: from Old French flour de lys ‘flower of the lily’.
See the Oxford Advanced American Dictionary entry: fleur-de-lis