circumcircle

[ sur-kuh m-sur-kuh l ]
/ ˈsɜr kəmˌsɜr kəl /

noun Geometry.

a circle circumscribed about a figure.

Origin of circumcircle

First recorded in 1880–85; circum- + circle
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019