- Pertaining to a photoconductor which undergoes a decrease in electrical conductivity when exposed to light. Also called light-negative.
- Pertaining to that which undergoes a decrease in a given property when exposed to light, or which otherwise has a negative response to light.
- An image, such as a photographic image, in which the light and dark areas are reversed in relation to the scene the image is taken from. Also called negative (5), negative image, or reverse image.