Fr.: rayons anticrépusculaires
Rays of → sunlight that appear to converge at the → antisolar point. Like → crepuscular rays, they are parallel beams of sunlight from holes in the clouds, and their apparently odd directions are a perspective effect.
Fr.: rayons crépusculaire
Rays of sunlight that appear to diverge from a single point in the sky when parallel columns of light, partially blocked by clouds, pour through gaps in clouds. They result from light scattering and an optical effect called perspective.
Crepuscular "of, pertaining to, or resembling twilight," from L. crepuscul(um), "twilight, dusk," from crepus-, from creper "dusky, dark."