bright segment

bright segment

[′brīt ‚seg·mənt]
(geophysics)
A faintly glowing band which appears above the horizon after sunset or before sunrise. Also known as crepuscular arch; twilight arch.
References in periodicals archive ?
The fire in her opal ring has died (141), while the husband, practising swipes with his heavy sword, "cut bright segments from the air" (141).