Rotating image of human brain, illustrating the lateral sulcus in the brain. The term sulcus (pl. sulci) is a general descriptive term for a furrow or fissure.
Halo may refer to: 1  Halo (religious iconography), a glow or ring of light around a head or person in art. 2  Halo (series), video game franchise.
Halo is a ring of light encircling and extending outward from the sun or moon. It form when light from the moon or sun is refracted by ice crystals of a cirroform cloud. Halos are typically seen as bright, white rings, however, refractive effects can cause a halo to have color.