[ in-sur-kuh l ]
/ ˈɪnˌsɜr kəl /
a circle inscribed within a triangle.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for incircle
Jupiter hath foure, that incircle his body with their motion.The Discovery of a World in the Moone|John Wilkins