Excalibur

noun
Ex·​cal·​i·​bur | \ek-ˈska-lə-bər \

Definition of Excalibur 

: the sword of King Arthur

First Known Use of Excalibur

15th century, in the meaning defined above

History and Etymology for Excalibur

Middle English Excalaber, from Anglo-French Escalibor, from Medieval Latin Caliburnus

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The first known use of Excalibur was in the 15th century

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