light-emitting diode
- n diode such that light emitted at a p-n junction is proportional to the bias current; color depends on the material used
light-year
- n the distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers
light adaptation
- n the process of adjusting the eyes to relatively high levels of illumination; the pupil constricts and the cones system is operative
light ballast
- n an electrical device for starting and regulating fluorescent and discharge lamps
light bread
- n bread made with finely ground and usually bleached wheat flour