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.
A ray is a line with an endpoint that extends infinitely in one direction. One of the most obvious examples is a sun's ray of light in space. Let's look at how light from the sun originates and travels: The light originates from the sun, and its path extends infinitely (assuming there's nothing to block it).