circumcircle

noun
cir·​cum·​cir·​cle | \ ˈsər-kəm-ˌsər-kəl How to pronounce circumcircle (audio) \

Definition of circumcircle

: a circle which passes through all the vertices of a polygon (such as a triangle)

First Known Use of circumcircle

1885, in the meaning defined above

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The first known use of circumcircle was in 1885

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