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.
The definition of dark is someone or something not light in color, without light or sunshine, gloomy or evil. 1  An example of dark is a black labrador retriever. 2  An example of dark is a house at night without any lights on. 3  An example of dark is midnight.  An example of dark is the time just following the death of a loved one.