Inbred strains (also called inbred lines, or for animals linear animals) are individuals of a particular species which are nearly identical to each other in genotype due to long inbreeding.
Freebase(3.00 / 2 votes)Rate this definition: Sunlight. Sunlight is a portion of the electromagnetic radiation given off by the Sun, particularly infrared, visible, and ultraviolet light. On Earth, sunlight is filtered through the Earth's atmosphere, and is obvious as daylight when the Sun is above the horizon.
Learner's definition of DAYLIGHT. 1. [noncount] : the light of the sun and sky during the day : the natural light of day. Open up the curtains and let some daylight into the room. As daylight fades into darkness, everyone returns to their homes. For pictures taken in daylight, use a different film. We could see daylight through the cracks in the wall.