Definitions

1. noun

A rare or obsolete term for the process of burning or fusion of a substance on its surface, especially in the formation of a crust or scab.

“The scientist studied the circumfusion process in the formation of the rock’s outer layer.”

2. noun

In astronomy, the phenomenon of a star or other celestial object being surrounded by a glowing halo of light, especially during a supernova explosion.

“The circumfusion of the star was visible from Earth, a rare and spectacular sight.”