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.
ultraviolet. n. 1. (General Physics) the part of the electromagnetic spectrum with wavelengths shorter than light but longer than X-rays; in the range 0.4 Ã 10 -6 and 1 Ã 10 -8 metres. adj. 2. (General Physics) of, relating to, or consisting of radiation lying in the ultravioletAbbreviation: UV: ultraviolet radiation.